Casual player wanting to come back.

I was a completely new player to wow when the classic came and I got to lvl 30 and got kind of bored after that and quit. I used to be orc warlock.However I actually wanted to be a dwarf and was just peer-pressured to playing horde. My main reason I quit was playing horde and not the race I love which is dwarves.So my question is: Is it worth to come back to wow classic? And if yes, what class is the most optimal for dwarf? I know it is also subjective but I mean stuff like clearing monsters, sustain etc. Probably gonna play solo since my friends already quit/ play horde. Thank you! :)