Find ways to consistently and systematically add more people to your database each week - i.e. cold calling, networking, online marketing4.

I could not find any details that confirm that online. 

There are some turnkey providers that are vertically integrated that might be of interest to you if you want to invest passively.

Then just yesterday, I come across the 1099 / 1099-NEC form requirements online from my own research.

You'll need good contact info for them to be able to collect, and ideally the new address for the tenant however which if you don't have can probably be found easily with some online sleuthing/ contacting their employer, skip tracing software, etc. 

Even small, consistent amounts add up over time.Learn & NetworkKeep reading REI books, but also join real estate meetups or online groups like here on BiggerPockets.

A specific property you find online would be even better.

A friend advised me to check reviews online and look for someone local with experience in single-family homes.

Each town is a little different, some require you to do a landlord registration and/or will want to do an inspection before you put a tenant in (calling the town would probably be the easiest, or they may have the info right online).

You don't want to invest in a place you have never been to unless you are using a vertically integrated turnkey provider that others can give you references for.