I work part-time and still live with my parents?
no, but it's time for you to start thinking about your future. What kind of work do you see yourself doing in the future? You might investigate your local education options - check out certificate programs - especially those ones that lead to a career. There's is a current and future demand for building & construction trades (electrical, HVAC, plumbing, carpentry, masonry, etc.)
What is your plan for the future? Do you plan to ever have your own family? Are you prepared for that? Even if you never plan to have your own family, what will you do when your parents can no longer pay for the house, utilities, groceries -- and everything else? Are you prepared for that?
That depends. Are you 17 or 45?
No, as long as you're employed and working on a way to become independent.
No, not at all. Start saving maybe move to a full time job.