I don't understand the grammar rules and I should take some time to educate myself but do I really need too?
To be perfectly frank, if you can't write a well-composed cover letter for your resume, you are ****ed as an adult.
I just type exactly how I speak. What I didn't noticed that everyone else write very differently than how they speak. It's like writing and speaking is different language. When you read a book out loud, you don't use those words to community or express ur words when talking to someone. I honestly have no clue how to master this "writing language/talent". I mean ppl recommended i should read more books and learn the "grammar rules" but they don't help you put words together inside ur head so u can write. Even some uneducated ghetto/urban kind of dudes write extremely well. Other failure on my list I guess.
It's admirable that you want to improve your grammar, and I get that writing sometimes feels like it is different from speaking. You should probably work on your spoken English as well. LOL.
Approach it as a two process; write your initial post and then rewrite it focusing on the things you notice.
For example, when looking at "When you read a book out loud, you don't use those words to community or express ur words when talking to someone." it is apparent that it could be phrased better. Just reading an awkward sentence out loud will make certain errors obvious.
Find a sentence or two that you recognize as well constructed. Once you understand the point that person was trying to make, write it in your own voice, and then see how yours can be improved. Look for online lessons and exercises, even ones made for elementary and middle school students, and see what you can learn from them.
Rest assured that the people who are insulting your grammar, regularly mess up on semicolons and other fine details. Improving your grammar and English usage can be a slow process, but the results are worth it. Especially if you expect to get better jobs.
PS. I still battle with learning the lessons I should have payed attention to in high-school.