You can very easily be a freelancer. There are varioud platforms online to become a freelancer and writing work can make you earn a decent amount. Initially the pay will not be too high and you will get a decent price for your writing but if you are consistent and are provide good quality writings then your ratings will increase leading to better income.

There are various sites but make sure to go through the sites and see if they are trustworthy or not as internet scams are all over the place but don't worry i am listing some good freelancing sites. You just have to register yourself as a freelancer and you can start working.

1) https://m.freelancer.com/

2) https://www.upwork.com/

All the best.