Just passed 12th, Want to start freelancing

Hey,

I just finished 12th, and I’ve got a few months before college starts, so I want to use this time properly instead of just wasting it. I’m trying to get into freelancing, but I'm not sure where to start.

I’m open to things like:

Data entry / Excel

Web research

Powerpoint presentations

UI/UX Design

And much more, just wanted to ask-

Where did you guys find your first decent freelance work? Any platforms, tips, or things I should avoid?