If you just want the knowledge, sure, take the online classes and tests.

The more people you meet, the greater chance you will find new cash buyers.Online Lead Capture FormAnother way to find cash buyers is through online lead forms.

I typically use regional banks to fund my deals but my 2 go-to banks have either slowed or fully stopped investment loans so recently I've connected with several online brokers but all came from ads or they reached out to me vs personal recommendations and intros so I have concerns. 

The online reviews are spotty.

The younger generation now sees that money can be made remote and by influencing or other things online, but it doesn't make you lendable (and most quit each thing every four months so never get the two years they need as 1099).

Also from what I've read online breaking into the insurance side of things sounds like it requires cold calling and building relationships with those reps vs just registering property in database and waiting.

Online title search companies.

Check out other online guides available here: https://www.biggerpockets.com/guides3.

I personally use propwire.com for residential lists but you can get them online from tons of places. 

As you get closer to investing, network through meetups and online communities to learn from others.