Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I can play between 4:30 PM and 10:30 PM on the week days, maybe slightly earlier depending on when i get home from school. Friday I'm not available until about 7:00 PM. On the weekend I don't have any plans atm so I can do pretty much any time then.