[Help] two part question

I have loved and watched basketball for years, but until recently I have not had the time to play it. The last month I've started to play pickup, and I have two questions that I believe this community can help me with.

1. I am a "big" in most games (im 6-4/230) and my biggest problem is knowing where to move without the ball. I can shoot, play D, whatever, but when the ball is not in my hands it is all guesswork. Are there any tips for what to do, how to read what my teammates are doing and move accordingly, etc.?

2. I am in the market for shoes. I have some Delta Forces now which look dope but they are flat and are basically a pair of Vans. My feet and shins KILL after games when I use them because they are so flat and have no cushioning from impact. I am looking for shoes that are comfy, stable, and I can run in for awhile in without my shins and ankles hurting. To give you an idea of what has worked for me in the past, my favorite shoes I've ever had were the Kobe V's. I'm open to any suggestion, but have preferred Nike and UA shoes in the past. Price is less important but my soft ceiling is about 150.

Thank you in advance.