I learned on here immediate brushing up is good for my English. I have learned that reviewing on iTalki is good for my English language skills. That's why I wrote this: 

I cooked fried rice again for breakfast this early morning again. This time I did't forget that the rice should be added last. I used a can of tuna, Negi ( like onion head) and an egg. Since there was is oil inside the can of tuna can, I did't have to put olive oil on in the pan today. Now, I know how to make the perfect fried rice. and I can also can arrange it in so many ways from now on. 

I made an appointment about for interview and examination with a certain trading company in Tokyo for 2 weeks from today. the week after Tuesday( I want to say 2 weeks later Tuesday). Earlier, I was rejected by 2 companies. only today, But they always cheer me up with their emails like below shown "Best wishes for your continued success.". So, I have to be going to be succeed although I'm I know this is entirely up to me. just success that I put on my weight these days. I'm know I'm overeating but it's ok., now is the time of hibernation.

*I tried really hard correcting what you meant. Most of the time, I did not understand half your were writing on. TIP: review on Connecting words. This will help your senteces connect with one another and more importantly, It will make the whole thing more sensible  to your readers (Words like/Ex: However, therefore, also, plus, On the other hand, On one hand, more critically, In as much as, etc...). Try not to repeat the words of previous sentences in order to add complexity and interest. Speaking of repeating, don't keep repeating the beginning of your sentences with "I". I this... I that... and so on. Good luck and happy new year.    

I have learned that reviewing on iTalki is good for my English language skills.

ITALKIを検討することは僕の英語力にとって良いことだと学んだ。

That's why I wrote this:I cooked fried rice again for breakfast this early morning. This time I did't forget that the rice should be added last. I used a can of tuna, Negi ( like onion head) and an egg. Since there was oil inside the can of tuna, I did't have to put olive oil in the pan. Now, I know how to make the perfect fried rice. I can also arrange it in so many ways. I made an appointment for interview and examination with a certain trading company in Tokyo for 2 weeks from today. Earlier, I was rejected by 2 companies. But they always cheer me up with their emails like below shown "Best wishes for your continued success." So, I have to succeed although I know this is entirely up to me. I know I'm overeating but it's ok. 

Fried rice again.

I learned on here that immediately brushing up my English is good. is good for my English (I don't quite understand what structure you were aiming for) . That's why I cooked fried rice for breakfast this early this morning again. This time I didn't forget that the rice should be added last. I used a can of tuna, Negi ( like onion head), and egg. Since there is oil inside the tuna can, I didn't have to put olive oil on the pan today. Now I know how to make fried rice and can arrange it in many ways from now on.
I made an appointment about an interview examination with a certain trading company in Tokyo the week after Tuesday( I want to say 2 weeks later Tuesday)wording is kind of strange. I was rejected by only 2 companies only today, but they always cheer me up with emails like below: "Best wishes for your continued success.". So I have to be keep going to be succeed although I'm just success that I put on my weight these days (Not sure what you're trying to convey here). I'm over-eating but it's ok, now is the time of hibernation for sleep. (Hibernation is a time where animals sleep through the winter. You can say it jokingly, but if its serious then that would be incorrect)

For the sentence "....but they always cheer me up with emails like below:" 

-the following message wasn't below the sentence so that would confuse the readers. You could have also said "but they always cheer me up with emails such as, "Best wishes......"

This was super impressive english nonetheless. Hopefully you get what you want.

Fried rice again.

I learned on here that immediately brushing up is good for my English. That's why I cooked fried rice for breakfast this early this morning again. This time I didn't forget that the rice should be added last. I used a can of tuna, Negi ( like onion head) and eggs. Since there is oil inside the tuna can, I didn't have to put olive oil on the pan today. Now I know how to make fried rice and can arrange it in many ways from now on.
I made an appointment about for an interview (examination [this is optional]) with a certain trading company in Tokyo the week after Tuesday( I want to say 2 weeks later from now on Tuesday). I was rejected by only 2 companies only today, but they always cheer me up with an email like, below "Best wishes for your continued success.". So I have to be (going to be succeed/headed toward success)  although I'm just success that I succeeding at/in putting on my weight these days. I'm overeating but it's/that's ok. Now is the time of hibernation.

Fried rice again.

I learned on here that immediately brushing up is good for my English. That's why I cooked fried rice for breakfast early this morning again. This time I didn't forget that the rice should be added last. I used a can of tuna, Negi ( like onion head) and eggs. Since there is oil inside the tuna can, I didn't have to put olive oil on the pan today. Now I know how to make fried rice and can arrange it in many ways from now on. 
I made an appointment for an interview with a certain trading company in Tokyo the week after Tuesday. I was rejected by 2 companies today, but they always cheer me up with an email like, "Best wishes for your continued success.". So I have to be headed toward success although I'm just succeeding in putting on weight these days. I'm overeating but that's ok. Now is the time of hibernation.いまは冬眠するときだから。