Check out local meetups as well.  

You will need to learn about the local laws, advertise, background check applicants, meet them for showings, answer questions, get a good lease, answer the phone at any time, arrange for repairs, do inspections, manage finances, manage an LLC, and more.

Check out the Bigger Pockets Real Estate Podcast Ep 968 on YouTube: 

I will check it out. 

Check out my personal favorite, Set For Life by Scott Trench , or The Total Money Makeover by Dave Ramsey.3.

If you want to learn more about the practice (and art) of safely and securely finding and funding a PML to see if it's for you, check out my book on BiggerPockets called Lend to Live: Earn Hassle-Free Passive Income in Real Estate with Private Money Lending. 

My preference is use AirDNA (premium) which include links to comps then double check their calendar/pricing. 

we had 250 investors that represented about 50 million.. and each and every loan save a handful were fractionalized and in the old days of course payments were in the mail and by check so we had a full time Gal ( Carol ) who knew the portfolio inside out.. 

Background and Credit check required2.

In the meantime, most UWs are checking bank statements for withdrawals to Affirm, etc., and then stipping for explanations to identify these debts.