2% is out of the question in Utah. If you find a good off market deal, you can get close to 1%.
Looking at the numbers you posted for your duplex, you aren't accounting for any repairs, maintenance, capital expenditures (as you stated), property management, or vacancy. I assume that when you say that this is a "half duplex" that it is one unit renting at $1350, not two. When I account for those numbers I calculate that you're actual cash-on-cash return is -1.5% and your return on investment (accounting for loan pay down and estimated market appreciation) is closer to +3%. There are definitely better ways to leverage your money.
As far as being a newbie and not knowing how to invest your money, that is definitely a personal preference on how involved you want to be. I know that the short-term rental (AirBnB & VRBO) market in St. George is screaming right now. I wouldn't be surprised if you were able to rent out your half duplex for $150-$200 per night. Even if you were 50% vacant, you could still get CoC returns close to 6.5%. But it is highly involved. If you are looking for more passive strategies, I would consider selling and looking at turn-key properties with a good turn-key company, or get into the lending business. There are tons of people looking for rehab money, and $50k goes a long ways in a rehab. A lot of those lending guys are making an 8%-12% return in 3-6 months.
My advice would be to figure out where you want to be on the "scale of passivity" as Brandon Turner calls it, and learn as much as you can!
Best of luck! Let me know if I can help at all!