They didn't have all the real estate books, blogs, YouTube gurus, financial calculators, etc.The best thing you can do is buy a house and educate yourself on how to manage it well.

What strategies have worked for you, and what should I watch out for?

I feel that I've watched enough videos and I am continuing to read.

There is no wrong way to do this unless you aren't doing it at all OR you're harrassing peopleIf you find yourself attending a bunch of educational webinars, watching too many tutorial/training videos, or anything other than those 2 things, take some time to stop and reflect. 

I have been watching Kris on YouTube for sometime now.

Watching the strike team go wild slapping stop work orders like crazy. 

You can watch and read all the books in the world.

part of BRRRR is sweat equity and watching things closely, and that's exactly what you can't do remotely / from Internet.you tell me - how will you not do this?

The education is nearly free, it's called watching YouTube, and reading books. 

Have you watched any of the shows on YT like this?