As a layman, I don't run into them, and usually need my cpa to reference one / send it to me to read to educate myself.  

Bigger Pockets is a great place for education and networking and is full of great content.I recommend that you check out the following resources:1.

When you went to drivers education, there was a manual and there was class time.

Determine a goal you’d like to work toward financially, is it “financial freedom” (whatever that means to you), buying a business, becoming self employed, becoming a full time real estate investor, having enough cash for your kids college education, having enough to retire, becoming a centi millionaire, etc.3.

Moises, if you are planning to make it a business and you will be doing it frequently you will not be able to use traditional financing to scale up, which is the reason you have to go with asset based (hard money) lending, where we are not going to look at your debt to income ratio, like traditional banks do. 

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

@Kearsten M HiggsTo invest in real estate, set clear goals, focus on education, consider market, lifestyle, and financial goals, and analyze deals using tools like BiggerPockets' Rental Property Calculator.

Don't let the distance scare you off too much; there's always a way as long as you are prepared, educated, and confident.

Continue educating yourself through books and online courses tailored to real estate and market analysis.

I have turned down a few apartment scenarios because I am not educated in the commercial arena at the time.