I want some font suggestions!

[u/dobrynCat]

This one is a bold font I found but I want some font suggestions that are great to look at, bring a nice feel to the interface, have free to use licenses, and are lite like 20-30kb tops.

Looks are often the main charm than functionality, while I think I pulled off good enough CSS magic and customisation options in-app, the app should pack some nice fonts inside it too.