I agree with most of what's said above, and I wanted to tack on:

Don't be afraid to try out a variety of different classes/characters to see what suits you. There's a lot of variety in character creation in CF, and characters play very differently and to different styles. An invoker is going to have a very different play style from a transmuter, and they'll both be very different from a paladin and so on. Similarly, fire giant warrior will even play very differently from an elf warrior, even though they start with identical skills.

Try out some different things, see what agrees with you, and most of all have fun!