Giving up my full-time job to be an indie maker. Advice?

I would read https://robwalling.com/2015/03/26/the-stairstep-approach-to-bootstrapping/ and listen to https://www.startupsfortherestofus.com/

I'm assuming you're a Indie Hacker and want to get out of the "rat race" instead of chase the VC dream.

SaaS is very hard, one of the hardest things you can do online compared to courses, freelance etc.

You will have to find a side husle next to your saas building to come by ,
but with you the best of luck :)

in terms of saas to start , take careful consideration if you wish to build something innovating where you need to find product market fit (with large risk of failure) or find an established market with some competitors where you wish to take it at a new angle (less failure risk)