Adding an additional unit is generally best from an investment standpoint, but it sounds like your personal life situation indicates that duplexing down is the best option...especially if plan to live there long term.  

It will be even harder as a young person with no life experience, and particularly no experience buying real estate. 

As always, make sure to run the numbers carefully and factor in local property taxes and HOA fees, which can vary widely in North Texas.Delayed gratification is key in real estate investing, but with patience, the rewards can be life-changing.Best of luck with your search

This is not a person who is making good life decisions. 

If the software is not simplifying your life or making you more accurate, you shouldn't use it.Software does have extremely helpful features like online payments, marketing syndication (click a button and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

Valuable and soon to be life changing profitability Lessons learned?

I just finished reading "Set for Life" by Scott Trench.

As others have said, it's all about your life situation.

Give yourself 10 years with that 200k and you’ll be set for life with real estate cash flow.

The 80/20 rule applies to most things in life but in Portland real estate it’s more like the 90/10 rule...10% of the agents do 90% of the work.