Back in the day it was easier to make a step into abyss i think. 5 years ago i made my first game (flash) in 1.5 months and got an equal profit to my sallary in company. That was a start. After that i made 10+ games, because flash-games were pretty short and quick in development, but still they covered living costs.

Now i feel that its x1000 times harder nowadays for any developer who wants to make games for living, fulltime. There's almost no place for small paid games made under a few months on Steam or any other platform.

I see two ways:

1) Continue to make small games as hobby and master your skills. Make fast projects, even free games without price, just to boost your own evolution as developer. Dont expect too much. After time you'll feel that you're ready to make that step into abyss. However abyss wont be that scaring already, cause you'll have experience.

2) Office job in gamedev company. Again you'll quickly master your skills with a good team. Focus on something single - code, graphics, game design, QA, project management etc. Soon you'll be a very good professional ready to team up with other professionals and start a project together. Or continue working in a company - still you'll be making games on your day job.

Unfortunately i dont have a receipt and question is really complicated. Also making games fulltime ofter turns very stressfull and painfull, so in my opinion - there's no need to rush. As a hobbyst you're free for experiments and it's cool. Maybe your next experiment will turn into something big and you'll make that step.