I was in the investment business for years and always thought it was interesting that on one side the stock investors think that RE is high risk, and on the other side, RE investors think the stock market is high risk. No matter what you invest in, seek to reduce risk through knowledge. You also have to choose a niche and from there you expand your knowledge base. Diversification is very important to me. Whether it's small cap growth stocks, large cap value, laddered bonds, single family houses, duplexes, syndicated apartment deals, medical office buildings - Learn all you can to get started, be willing to make mistakes and then just keep learning.
I was so completely lucky with my first rental, I rented a nice place at below market to a woman and her young boy with cancer - I kind of felt like it was a contribution to the universe to keep it affordable for her - and what I learned was that if you can stay just below market people won't leave. Where you lose big time is through turnover. As a self managing landlord the other thing I learned is you have to keep track of what rents are doing in the market or one day - as I did - you wake up and find out you are so far behind the market you're going to lose your tenant when you raise the rent and then have to remodel because they lived there so long. Lesson #2 out of that one was - keep abreast of what's going on, and either keep fixing places up along the way or have a slush fund to remodel when a long time tenant leaves - either way, it costs money to maintain a building
Second property - I bought the cheapest house in a super high demand town by Xome auction - won't ever do business there again - it took 6 months to receive the title. Then it cost me $80,000 in contractors to rebuild the entire place because I lost all my contractors waiting for the title to arrive and I had to make do with a string of contractors in the middle of summer who didn't have my best interests at heart. Lesson # 3 - have your act together and know who you will do business with before you leap into a purchase - you can network every week through meetings, your local realtors, old landlords who like to shoot the breeze over coffee. Because of wasting money on contractors who didn't do things right and having to redo them - I make about 9% cash on cash at this house now but it was painful and my husband thought I was completely nuts. When it was done and he saw profits, he became a believer and told me to keep going because I learned so much the hard way it would be a shame not to.
Third Prop - slightly overpaid for a ready 3 BR house and put about $9k into electrical, tree trimming and pouring a driveway. My cash on cash is about 14% now - but before I got here I used a property manager who failed to put utilities into my name when a tenant left last Dec and it was 4 degrees below zero. The entire house froze, even the water meter busted out. Lesson #4 - you can't take your eye off the ball and you have to manage the managers at some level of frequency till you know you can trust them.
4th Prop - finally understood why people like multifamily, bought a slightly shabby solid brick 4-plex in a fantastic growth town and make about 13% cash on cash. 1 apt totally rehabbed, taking a forgiveable landlord rehab loan through the local govt to rehab 1 apartment and agree to a section8 tenant in that apt for 8 yrs. The other 2 rehabbed as money became available. Lesson # 5 - Ask questions, demand more and then ask some more questions. Keep asking till you get the answer you want. Don't be afraid to negotiate, don't be afraid to ask more than once when you get a No, just be polite about it.
5th prop- duplex, old siding on the outside but the owner spent $51,000 on it 8 yrs ago and redid the entire place all the mechanicals, new roof, wiring, interiors - the important stuff. Sat on the market for 18 mo as people turned up their noses at the mustard yellow aluminum siding - which I can replace for about $6k when I get to it. Meanwhile my cash on cash return is 22% and the tenants are keepers. Lesson # 6 Just because its ugly doesn't mean it won't make money. I can fix ugly. When I got started I looked at properties too much through the lens of whether I would live there. I'm more balanced as an investor now, and also more realistic.
I'd say most people outside of RE think that RE is high risk. Just go for it, you're young, if you fall down you'll get back up. Have fun!