What skills to develop as an 19 year old trying to work from home?

Hello, I am a 19 year old student who has a somewhat decent amount of free time and I want to do something productive. I know basic video editing on capcut and I can make like those youtube informative short video thing. I have triedd Fiverr for a long time but to be honest, I had no luck. I could either improve my current skill (video editing) or I could develop something new such as maybe excel or what not. I need the money to handle my own kharchas.

I can invest in courses maybe but I mean there are free courses about everything and I personally prefer learning from trial and error after knowing what the basics do rather than just watching someone else explain me