Any learning material link/book/video I can go through to learn more about them? 

I recall Brandon mentioning it's not all about profits, it's also about the learning experience.

@Logan M.Depending on your scale of units and issues I would say buy a drain auger 1st if you don’t have one and that seems to fix a mass majority of our issues roots, grease, dipers, ect Now you or a tech would need to learn to use the Machine, they can be dangerous but for us maybe about 2-5 % warrant needing a cam for deeper investigation.

being a new build we had to add some basics, like blinds and a yard (including a sprinkler system that I installed myself, I learned a lot there)What was the outcome?

For loaning money, you'll learn something about the friend and hopefully feel good being able to help someone out. 

My plan is to learn and work with seasoned investors.

I've been hesitant to go into business with friends, but it could be a powerful play, and a valuable learning experience.

It is a great place to learn about real estate investing.

High cash flow high value add Lessons learned?

However, while we were cleaning up, we treasure hunted out at least $3000 stuff, including $300 cash on the floor, several un-opened Amazon boxes, new-in-box computer/gaming items, hair tool ($300), YouTuber's gadgets, new with tag heated jacket ($220), an unassembled exercise bench ($500 at least), so many new or near new stuff that you can sell.