To answer your questions quickly:
• Where do I connect with the team with the right mindset? You don't need to. Just get started and all that would happen organically
• How do I analyze deals like a professional investor? Analyze your first deal and over the years (or 10,000 hours) you will become a professional investor
•How do I take action and buy a real estate property and profit? Buy your first property
•Where do you find private lenders? Ask 10 people on BiggerPockets AND Ask 10 people on the MeetUp group you are going to find today by searching real estate in Brooklyn on Meetup.com.
•Is it a bad thing if I have no money to start? Yes, not having money doesn't help BUT how much money do you need is the question. Maybe you need 3.5% down for your first home ($100k) - yes that home may not be in Brooklyn but somewhere else in Beautiful America! Go find that city and move there.
Starting your journey in real estate takes a lot of doing and sacrifices. Get started today!