IMHO, I would go with sorc just to mf. I would go with orb, just because you can hit moving targets without having to recast to catch them as you would with blizard. I would advise to also go with a second element to handle the cold immunes. I have an orb/meteor sorc that does well in hell.
Try to get youself sigon set to start with. Excellent beginner gear. Then as you lvl you will find some decent gear you can trade for MF equipment. Or if your lucky you may find a room where someone is dropping free gear.
Besides that try making a hammerdin. Great way to kill, but kinda gear dependant. What are you on USEast? If so I may be able to help with some gear if you like.
Lastly welcome to Battlenet, check out the thread on builds you will find something there im sure that will suit your needs. Enjoy.