A lot of lessons learned in 3 years for a lot of people on the financial fundamentals of positive cashflow.

Have you already read the Ultimate Beginner's Guide here https://www.biggerpockets.com/real-estate-investing, it would be a good book to teach the fundamentals of investing that should work anywhere. 

If you want to be a landlord and real estate investor, you'll have to learn how to screen and manage your own tenants--it's a fundamental part of the gig, so the sooner you learn how to do it, the better.2) "Is now the right time to get into the market?" 

There may need to be more of a "rebalancing", but I see that more likely in the form of broad based measures (print more money to subsidize lower earners, increase taxes, etc) - which fundamentally, I don't see being catastrophic in light of being bullish on next decade of economic growth. 

For books I would suggest; Millionaire Next Door (teaches you that millionaires dont have exotic cars and mansions), then Rich Dad Poor Dad (Teaches you fundamentals of cash flow and compound interest and discipline), Then get into the real estate books (How to get started in Real estate by Brandon turner, Crushing it, what every real estate investor should know about cash flow, and the BRRRR strategy are great places to start.

More likely though, you will be able to learn the fundamentals that go into making a property successful.

My hunch was that good cash flow rentals with solid fundamentals wouldn't be affected that heavily, so this definitely reinfornces that.

Fundamentally, this says if the balance has big declines, then so will the payment the following month.  

There are fundamentals to evaluate, but they simply don’t matter to buyer’s because there is no supply.

Stick with fundamentals.