I quit my job back in January (with proper 2 week notice), but I do all sorts of online work to keep my income diversified. That is key to succeeding on your own, making your own money, is to diversify where it's coming from.
So I get income from YouTube,Affiliate Marketing,Brand Deals,Crypto trading, Steemit posts, and any simple small job I can find in real life (ex. watching someones dogs for the week)

The one thing I want to tell you though is when you are out of your job you'll have tons of time to do what you want. You're creativity will flourish and you'll start finding more ways to make money on your own and Since I quit my job, I have studied so many things, and taught myself skills I've always wanted to learn but never had time and NOW I feel I am worth so much more, I'm so much more skilled and valuable to any future employer, if I'm not using those skills for myself.

Anyways, good luck man!