All classesare good. Play what you like and will bring you joy! Dont worry about meta as it will come in mid of season anyway.

If you want solo then WD and Crus are easest ones i think. Wizz, Dh you need more skill. 3x WD with zunimassa and 3x voodo will give good boost for group. But this game is made in so cool way that if you take to much debuffs or buffs you will lag rift so much it will be impossible to play.

For example you cant have 2 wizz as dps in gr upper than 90 as it will lag group so much.

Imo start with WD then play and learn how to multibox. After some time you can do other classes including meta. If you multibox its easy to farm gear as always you have x times extra gear as many same class you have in your set up.

One of good things about WD is with free set you will be able to push GR same as speed farm TX.

Remember game play need to be fun for you not boring. Do the way you like it.