Welcome to the board.
I would go ahead and clean it first, using something like Hoppes or equivalent. I've been using synthetic motor oil for years on various firearms with good results. Just take a q-tip and put a light film on all sliding contact surfaces. Doesn't take much.
I would also recommend you take a handgun safety course ASAP if you haven't done so already. There's a lot that new shooters aren't aware of regarding trigger discipline and safety practices.