Currently you have the "invaders"; so Falcons, Bears, Wolves, Jaguars, Vipers, Cats and Sharks. But there are decals available for most if not all of the homeworld Clans so with a bit of work, you could pretend to be something else.
I'm no 100% expert, but the current recommended starting Hellbie build is something like 3 ER Medium Lasers and 2 Large Pulse Lasers (or heavy large lasers), AMS, ECM and maxed armour. I haven't used it myself, but I've heard good things about it as being a great way to get started.