I thought about this question for a while. My kids are older than you so if they asked me what do do the answer would be different because they have a lot of support.
If I were on my own with no help at 17, I would start off with something hard on the body but easy on my mind so I could learn a lot in my spare time. ie. I would most likely start off in a construction company as a drywaller or carpenter's apprentice. After 2years I would ask to be moved to a plumber or electrician's apprentice. (my preference would be plumber) At 21 after 4 years that is when I would make my first purchase.
You would have W2's, (T4's in Canada) a stable income to get a mortgage and should have a few dollars saved up for that down payment. Not sure how it is in the USA, but minor's cannot execute a contract so you would need to be 21. In Canada that is 19. I would try for a duplex and house hack. I would be looking for a problem home with "plumbing issues." I would use my knowledge and free time to fix the plumbing issues /drywall. As a property manager, I see these issues all the time. Leaking pipes, causing water stains in the ceiling/wall etc.
Well that is my 2c for how to start.