@Jonathan J.
Welcome!
Great questions to start asking.
Short advice from me on a few topics:
You are already in the right place for education. My advice is to start applying that knowledge by taking action. I am a firm believer that you truly learn by doing. That doesn't mean invest foolishly. Choose a strategy & proceed with it. Try to really excel at that strategy before getting distracted by the next shiny object syndrome. If you follow Brandon, he always stated, It's more important that you choose vs what you choose! That is another way for saying to make up your mind and take action. I highly recommend starting with residential real estate. Either SFRs or small MF in good areas! Maybe house hacking! SFR or a duplex offers very predictable returns and has the best financing options available. If your local market is too expensive, don't be afraid to venture out of state. There are plenty of excellent markets out there.
To build a team, start with your core necessary people (lender, broker, property manager). You will find many recommendations on here. You can expand your team over time as you grow (CPA, attorney, etc.).
To find a mentor, don't barrage them with questions like everyone else does. Go work for them for free and add value to them before asking any questions. That, or join a niche community that fits your interests.
Another book recommendation: The Millionaire Real Estate Investor by Gary Keller.
Hope some of this helps.
Best of luck to you! ; )