Hi Mitchell, Welcome to BP. I think it's great that you are getting into real estate at 17! I wish I would have had the vision to get into it much younger so congrats! Getting a mentor is a good idea but with any business relationship, not just RE, the other person is normally looking to get something out of it. You may get lucky and find a person that will take time to explain things to you but you will open many more doors if you have something to offer.
You could try to specialize in something: digital marketing, social media, direct mail marketing (managing a mailing database, designing mailers), real estate software programs, etc. Pick something, read as much as you can on the subject and become enough of an expert that you can solve someone else's problem. If I were 17, I would pick something somewhat technical, there plenty of people with lots of investing experience that might not know the tech side or be up on the latest tools, apps, etc. They might be too busy, so time you could save them is valuable, offer your services for free in exchange for chance to work with them. I did this 15 years ago by just picking one lead generation software, learned it and then offered my services to agents. I was a simple task of logging in and responding to new leads- but they were happy for me to take something off their daily to-do list. Just an idea....Good Luck.