I hope you don't feel like you're getting too many answers, haha. It just needs a few tweaks here and there:

I personally diasgree with the opinion that everyone should learn how to cook.

First of all, if you can afford to buy food for every meals, you literally ("literally" is used more when you're saying something that could be interpreted in a non-literal way. So if you said "Studying for that test was so hard, I was banging my head against the wall," someone could think you just mean that you felt like you were banging your head against the wall (that would be the opposite of literal, "figurative"). But if you said you were literally doing that, then people would know you were actually performing the physical act of banging your head against the wall. "You don't need to cook for yourself" can't be interpreted figuratively) don't need to cook for yourself. You can simply (I would use "simply" instead of "just" in this case, and I'd put it before "eat at a restaurant" since both "eat at a restaurant" and "have your food delivered" both work together to make the same point, since you "can afford to.") go have your meals eat (You can say "have your meals," but it's a little more concise to just say "eat") at a restaurant or just have your food (you don't need "your," because since it's being delivered to your house, and we know you don't want to cook for yourself, we already know that the food is yours) delivered to your home, if possible.

Secondly, if (you don't need to capitalize the "i" in if, since you started the sentence with "Secondly") you're so lazy that you really don't want to learn how to cook, because you're such a lazy person, (hahaha, I love how brutally honest you are there. I think just calling someone "lazy" is more to-the-point than "a lazy person." There are other cases where calling someone "an [adjective] [noun]" does work better, but you don't need it here. You could also say "so lazy a person" if you wanted to keep "person" and emphasize how, of all people, this person stands out in how lazy he/she is, haha. Also, if you're talking about how [adjective] someone is - in this case, lazy - then I would mention that at the beginning of a sentence, instead of putting it after "because." If you said someone was just "lazy," then it would work to put it after "because," but since the person is "so lazy," it works better to introduce the sentence with that.) then you can just get married to marry someone who loves to cook with your their undivided attention. (Since your spouse is the one cooking, and he/she loves it so much, it's their undivided attention that they put into the cooking. Also, I would end that as a sentence. It runs on a little too long if you attach it to the next part) or If it comes to be difficult to get married finding a spouse becomes too difficult, (you have the right idea, but I can't tell if you want "getting married" to mean finding someone to marry, being married, or putting all the planning and legal work into having a marriage ceremony. I assumed you meant finding someone, since the focus seems to be on getting a spouse who loves to cook. "Come to be" is technically correct, but "becomes" works better here..."come to be" sounds a little too dramatic haha). you can hire a professional chef (paying hundreds of dollars) for it (I'd put that in parentheses, because it's a sort of side-note you're making. Also, just saying "it" sounds a little too vague, especially since a chef is a person, but using "he/she" wouldn't sound good) or live with your parents till you get tired of their food.

So by the end of it all, it would look something like this:

I personally diasgree with the opinion that everyone should learn how to cook. 

First of all, if you can afford to buy food for every meal, you don't need to cook for yourself. You can simply eat at a restaurant or have food delivered to your home, if possible. 

Secondly, if you're so lazy that you really don't want to learn how to cook,  then you can just marry someone who loves to cook with their undivided attention. If finding a spouse becomes too difficult, you can hire a professional chef (paying hundreds of dollars) or live with your parents till you get tired of their food.

 Let me know if you have any other questions, though :)

Speaking Test

I'd appreciate if you listen to my answer below to the question and tell me how it sounds in terms of pronunciation, intonation and grammar things like that. Thank you :)

Question:
Do you agree or disagree with following statement? "Everyone should learn how to cook." Use your specific reasons and examples to support your answer.(1min)

My answer:
I personally diasgree with the opinion that everyone should learn how to cook.

First of all, if you can afford to buy food for every meal, you literally don't need to cook yourself. You can go and have your meals at a restaurant, or just have your food delivered to your home if possible.

Second, If you really don't want to learn how to cook because you're such a lazy person, then you can just get married to someone who loves to cook for you with undivided attention. If its difficult to get married, you could hire a professional chef paying hundreds of dollars for it, or live with your parents until you get tired of their food.

Speaking Test

I'd appreciate if you listen to my answer below to the question and tell me how it sounds in terms of pronunciation, intonation and grammar things like that. Thank you :)

Question:
Do you agree or disagree with following statement? "Everyone should learn how to cook." Use your specific reasons and exapmles to support your answer.(1min)

My answer:
I personally diasgree with the opinion that everyone should learn how to cook.

First of all, if you can afford to buy food for every meals, you literally don't need to cook for yourself. You can go have your meals at a restaurant or just have your food delivered to your home if possible.

Second, If you're such a lazy person you really don't want to learn how to cook, then you can just get married to someone who loves to cook for you with undivided attention. If you find it's difficult to get married, you can hire a professional chef and pay them hundreds of dollars, or just live with your parents till you get tired of their food.