Brandon is excellent and explains very well.

Be sure to watch/listen to all of the podcasts, those are an excellent source of information and the BP books are a huge help as well to learn as much as you can to be ready to buy when the opportunity arises.

Understand that many professionals use this app, so there is a lot of competition so what will make you stand out from everyone else is education and persistence.Make your day productive with tools that are actually working and not drive around polluting the world.Good investing...

Do activities that generate the highest value possible, most often finding deals or selling yourself/your product.

Knowing I would be in the market for such a product, I bookmarked the link to PenFed and waited until I was ready.  

But these are also excellent opportunities for bad actors to collect money from a buyer and then fail to deliver when the contract is fulfilled. 

I do listen to excellent podcasts on Bigger Pockets and am currently in process of doing my second "buy and hold" deal most probably in Jacksonville FL.To all my knowledgeable friends here,  I want to say you do a  "Great Job" teaching others (through discussions) so that Real estate becomes a joyful adventure where newbie investors like me can gain from superb advice !!

Rental history is excellent.

@Zach Crawford You can still get mortgage under portfolio product.

So you can work with your sister, or try to groom someone into being a competent/excellent manager, but finding an experienced manager will be challenging- until you've expanded your footprint substantially.