Man, listen to me, the weight of your calves, quads, or any other muscle will hardly interfere with your freestyling ability. Freestyling is all about your technique and muscle memory (also known as practice), so don't worry about your leg size. Look at Roberto Carlos, Zlatan Ibrahimovic, Ronaldinho, etc, these are pros who have huge legs that can also freestyle pretty well. Also, I speak from experience, my legs are very big (leg extention 250 lbs*15, squat 365 lbs*5) and I am a pretty decent freestyler. As for what to wear, I personally prefer the most comfortable shoes that I can find, simple as that, although for me having a very thin surface helps a lot. I sometimes freestyle with a pair of Puma casual shoes, other times with a pair of old Kelme indoors. In short, don't get hung up on what you're wearing, because it will barely help at best, and in the meantime you will have spent loads of money.
God damn brewery!!!