It's correct more or less, it depends on the context of course.

recommended to use!

Nice text, one note is that, it is not recommended to start a sentence with the word "But". you had better use "However" in this case. Again it's not suggested to write "For me" right in the beginning of a sentence because it is very colloquial. You you can say: "In my opinion" for example. and I don't recommend using comma in the last sentence before "even" In general, good job!

Well, I think everything can be natural as long as it makes sense and doesn't include big grammatical mistakes! There is no solid definition for natural since we are not bots! If a bot does something that is not programmed for, it can be unnatural, but we humans are more flexible. Perhaps this sentence can be unnatural if you use it in a very friendly atmosphere because this sentence looks to be more used in academic atmosphere. For example if you talk to your bestie you would say: 'She decided to go freelance to earn more money '.

Well the problem in learning a language is that you can learn the most common phrases because they are being used the most and you get in touch with them a lot, but when it comes to phrases that are nice and more literate and can bold your knowledge, well you have to put a little bit more effort to keep them in your brain! Personally, I use phrases that bore me even though I may know some better phrases, but I don't use them simply because people wouldn't understand which is because I live in Italy and they don't speak English! But some common sentences I can use can be: 1. I will get back to you ASAP 2. hold on, please 3. keep it away from me 4.Not interested 5.Can you hold this for a moment 6.What's your job? 7. How are you doing? 8.How much does it cost? 7.What is the price? 8.When is the deadline? 9. Should I come tomorrow also? 10.Isn't the meal ready yet? 11.Who cares? blah blah hahaha I can continue for hours maybe if that's what you wanted!