I've been looking at some of the online lenders (Better, Figure, Rocket Mortgage, etc) and while they offer a decent product, perhaps there is a lender who is local to Indiana that would offer a HELOC with better terms? 

Any online method i can ask tenant to use that can deposit the amount to my bank account which is free for tenants and safe method for me to use. i had issue with one of the check send by tenants (not a tenant fault)and i was about to fall into scam as i tried to deposit the check online but now want to stay away from Checks. venmo/zelle doesn't allow bigger amount transfer.

I'd say the average person (maybe not investors on BiggerPockets) would get lost the moment you say, "You can find these loans yourself online...

However, it's important to understand that it is not an OTA (online travel agency) like Airbnb or VRBO.

We see it more often than anything that people come into the business and within three months, they already give up because they thought it was going to be such an easy business because of how people portrayed it online.

Of all the online “methods” house hacking or small multifamily hacking really works.

One tidbit to note—the two biggest online rental listing companies are Zillow and Co-Star (Apartments.com is owned by the latter).

According to their research online, Charlotte ends up appearing fundamentally as an affordable option with great fundamentals.

Are there any online platforms or institutions you recommend for studying real estate principles, market analysis, and property management?

You can find them here on BP or online like meet up.com and places like that.