That’s great you want to get started freelance writing! Writing for school or university is different than online writing (this post lays out some tips: https://elnacain.com/blog/5-grammar-rules-every-blogger-must-know/). But in saying that, it just takes practice and reading online content to be familiar with it! If you have the passion and motivation you can become a freelance writer!
A word of caution: Remember that where very little is required, very little is offered. These jobs don’t pay much, and they are not going to provide a reference for your resume. It may take working at several different of these online jobs to pull in the income you want. And as always, know the signs of a work-at-home scam as you sort through the opportunities.