As far as credit, you would want a score above 680 ideally to get the highest loan to value on a cash out refinance, but I would aim higher at 720+ as that comes with a significant rate drop.

You don't need to know everything to get started; you need a foundation to build on, and the rest will come through experience and then refining your education.You can build a basic understanding of investing in 3-6 months.

It seems as though you might get some of your money back on the refinance so I would estimate how much you'll have "left in the deal" after refinance.

There are quite a number of things that can make utilizing an FHA loan more difficult such as more barriers during appraisal, appearance of low qualification/little cash, typically longer closing period, likely higher interest rate, and PMI cannot be dropped without a refinance if 3.5% down.That said, just chain 5% down conventional loans, and make sure your duplexes pay for themselves.  

Focus on wholesaling the leads I get from my campaign (while refining my underwriting and acquisition skills) to stack up cash, then begin acquiring rental property.2.

It might be a better decision to do a 75% Cashout Refinance.

You don't need to know everything to get started; you need a foundation to build on, and the rest will come through experience and then refining your education.You can build a basic understanding of investing in 3-6 months.

I understand it become tad difficult to refinance since some lenders wouldn't lend on the home in trust, but is it easy to sell a home in a trust, just like you are buying in a trust?

@Steven Catudalthe 'no cash flow on a BRRRR' is typically just because you are boosting the ARV and then taking out the maximum amount you can on the refinance, often using a DSCR loan with a higher rate. 

You don't need to know everything to get started; you need a foundation to build on, and the rest will come through experience and then refining your education.You can build a basic understanding of investing in 3-6 months.