Hey Ethan,
I was 23 - Bought & Sold 82 Single Family Rentals, 434 Multi-Family Apartment Units, 2 30,000 sf office buildings, a 3 acre Parking lot for tractor Trailer Storage, 8 Condos, and 2600 + Self Storage Units.
Once I bought my 1st Self Storage Facilty, I sold Everything except for Self-Storage, and now, Life is pretty darn good - No tenants, toilets, or trash - I just wish I would have started with Self Storage First.
I'm now a National speaker and Trainer in the Self Storage Industry - My 2nd 7 figure business.
Great idea you have here, asking others where they started, and after mentoring Hundreds of beginning investors like yourself, I'll just share a few tidbits of "experience"
1. Don't buy into the "Passion" Hype - Follow the best business model, and get REALLY Good at it. Passion is watching your bank account rise, no matter how "Attracted" you are to single family homes, or apartments, or mobile homes... etc. Look at the trends - The Money is in the simple businesses in real estate - Self Storage, Warehousing, etc. Let all these other guys and gals have their tenant and toilet businesses - 95% go bankrupt in 5 years anyways ( Ask me how I know about this)...
2. Get a Mentor. Free mentors are great, but they can only take you so far. Paying for a Business coach will shorten the curve and save you (make you) $ Millions over your career by starting with the right skill set, and having someone keep you accountable. I have spent A LOT on coaches, and not 1 ounce of regret - they have made me millions.
3. Don't chase shiny objects - Choose a path and FOCUS (Follow, One Course Until Success).
4. Don't let other people's fears, or doubts keep you from launching. The Naysayers will always be around with a firehose, ready to drown the flames of your desire to go out and make something of yourself - It makes them feel better if they keep you from succeeding so that they don't look like failures.
Ok, this post is getting too long.
Welcome to Bigger Pockets Ethan. Go find a niche, pull the trigger, and then strive to get better at your craft each and every day.
Now, Go CRUSH it Son!