I am looking to get my first underwater camera. I have plenty of topside photography experience but, aside from a GoPro knockoff I returned after one dive, no underwater photography experience. I have an opportunity to buy an unused Olympus TG-6 for about half the market price but am trying to understand what will be my costs in accessories before I can start using it practically. I am an AOW rec diver, and most of my diving will be shore dives, so shallow, with an occasional deeper boat dive. From what I've read, it looks like I'll need (at least if I'm going beyond a few meters depth) a housing. Do I need a tray and strobe to start? If so, what am I looking at in costs there? I enjoy macro as well as wide angle photography but if I can shoot macro right out of box, I don't mind waiting a while before purchasing a wide angle lens. TIA.