Start by reading the Ultimate Real Estate Investing Guide: https://www.biggerpockets.com/guides/ultimate-real-estate-investing-guide/introduction2.

Here is a guide to help you with the financing side of the BRRRR.

What are some guides and tutorials that go into detail with literally the intro to real estate investing?

“There is also 1% loan commitment fee and $500 documentation fee.Please guide if it is something to agree or keep looking further ?

Plus I have a partner/mentor that is guiding me along the way.

It's hard to stand out.There are some owner-occupied segments with people who share motivating factors for selling their home.Seniors with Long-time Ownership: often ready to downsize or transition to assistance.Homeowners with Low Financial Stability Scores (FSS): Struggling financially and likely ready to cash in on their asset.A list broker should be able to help guide you in the right direction.Good luck!

Need some perspective from folks that have done it long-term to guide me through the doubts.

However, some suggestions:  rent a junkyard dog, hire a patrolman, motion sensor high beam spotlights, board up all windows and doors with 3/4 plywood.Seriously--just try to harden the property and let the neighbors and local precinct know about your concerns, and provide a contact number. 

I see in the Easton ordinance guide (link) requires "The City must be notified of any changes in ownership/manager within five (5) days of any change." but not whether a new rental registration is required. 

Agents GET PAID to sell...not be a babysitting tour guide.