Honestly, I would take your class for permit to carry. It could never hurt to better versed in how to handle a gun responsibly. It's only a 4 hour class, and it gives you a state license. That could clear up some future legal issues. Also a revolver that is hammerless is best. Revolvers are idiot proof, just pull the trigger unlike a semi. I own a Sig Sauer 9mm and am investing in a revolver that as I mentioned is hammerless. the benefit of no hammer is if you need to take it out in a rush the hammer can get caught on something, with out the hammer that takes another obstacle out of the equation.
But understand me completely, I would take the permit class 100%!!!!! and as mentioned above always buy new.
Just my $.02