The reason caster are good to start with, is because the buffs provided by the in-game helper increases their damage AND cast speed. It helps a lot. The fighters don't get a damage increase.
aVx's suggestion is good too, it's actually quite a unique class, but you'll be using your wolf a lot. If you're into using a pet, go for it.
Archers are another option, but they're not that great without extra buffs. They're also expensive.
Buffs are immensely good in this game, but that doesn't mean you can't play without them. You're new, just make whichever class you think sounds fun, an