You've gotten a ton of good advice, so in case you need more: if you feel like you don't know what you want to do, it can help to make clear distinctions within your current situation: what do you like most about your crummy job? what do you like most about living at home? Lean into those, maximize them in every way that you can.
This can shift your mindset and help develop your instincts, leading you to take more and bigger steps toward what you really want (even if it's hidden from you now).