So many ideas, where to start?! Start with one of these:
Join Fiverr and sell your services at $5+.
Become a freelancer on Upwork.
Crafty? You should start an Etsy shop.
Shopify. Sell some t-shirts using Printful as a dropshipper.
Teach something you know with Thinkific courses.
Write a short eBook on Amazon and tell your friends.
I could give you tons more, but I want you to start now and stop reading.