I lose my house last year because of a situation that was out of my control (long story involving an over spending relative and a friend that we housed for 3.5 years for free who ended up opening multiple credit cards under my name and completely destroying my credit ).

Is it simply getting a real estate license and submitting an application or is it more involved?

I'm now looking to get involved more deeply in the investing side -  through buying and holding, and at some point flipping - focusing on helping those who may not be able to purchase a home through traditional methods still realize the dream of home ownership.  

I have been involved in all types of work.  

It involves tearing down and rebuilding completely, so its alot of work for my partner. 

Wholesaling involves acquiring property at deep discount and assigning it at a slightly higher cost to an investor.

Do I need someone else involved when trying to put a house under contract?

Homeruns can be fantastic, but they involve a lot more risk (which I'd be okay with) but also a lot more effort (that's where I lose interest.

Freddie/Fannie issues come up as well, primarily when PMI is involved, so you need to stay up to date on PMI guidelines if doing short term flips, many of them have NO WAY in 90 days rule, and 90-180 days a 2 Appraisal rule, and it doesnt stop at the PMI company, some Lenders have their own internal set of guidelines on this, so one bank may be able to do it and another cant using the same secondary financing, the funny part is most loan officers have no clue what you are talking about when you try to cove this on the front end.

I have been involved in many real estate deals in the past, but viewed my investing as a hobby.