By watching these videos I've recently learned I already made my first mistake by buying the wrong property for our 2nd home, lol.

I helped a lady purchase her first home, and every house we saw that needed some work she would respond, "Mike can fix that" (her boyfriend).

As you read these books, watch the BiggerPockets podcasts.

Any tips or guidance on what I should watch out for ?

Watch major Duggan's State of the City address he just gave the other month (google it). 

We are doing ground up, given the metrics of Orlando creating a lot of value out of the ground, but caution folks to keep an eye on new housing starts in a given area and watch for oversupply.

You also have to watch out for specific zoning overlays, ie. around the temple area, you need 480 for sqft. for all units.

Just check out this crane watch:https://www.bizjournals.com/sanantonio/maps/project-watch

I've watched all the calculator tutorials but do not know which one will be the best for me since I will not need a loan to purchase the home.

I've already watched a few BreakIntoCRE videos, and they've been really insightful.