I've been searching for wallets and I'm not sure which to use.

My situation:
I want to try gambling on Fortune Jack. If i win something I'm simply going to cash out and never use bitcoin again, the same if i lose. Or maybe ill gamble again every once in a little while. But that's practically the full extent of my use for bitcoin.

So based on my personal use of bitcoin, what would be the best wallet for me?
I'm new to bitcoin in general so if someone could explain the process of selling as well, i would appreciate it.
Peace//