Forget about the best life possible. Right now you are stuck and seem quite miserable with where your life is at. You can't magically go from miserable to the "best life possible". There is an in-between area, where obligations such as working to live independently financially come into play.

And realistically, every human has their bad days and their own demons to battle. Very few people would describe their current life situation as the "best life possible". I would encourage you to abandon the idea of magically arriving at the best life possible stage, and focus on more realistic goals.

Ultimately you will have to decide if you would rather:

1. Live at home with unsupportive family, be supported financially (not have to work) but be miserable, or:

2. Work on living independently through hard work.

Both options probably look pretty crappy. But keep in mind that nobody starts at a high paying job without having a degree or previous work experience, or both. Very few people start at the top of the ladder without having done any work first.

It's 100% up to you how much work you want to put in.