It’s definitely not doomed to fail but you must decide whether you want to follow meta or do your own thing 
Here is for example a build with Primal Strike as a nuke and Savagery in-between
[1.1.5.0] Druidic Explosion - A Pair of High-AoE, Screenwiping Lightning Druids (don’t click, just saying some do it with success)
You can choose support class that has skills you like the most / theme you like the most
(I mean one of Soldier, Demo, Occultist, Arcanist, Vindicator)
Maybe mess around for now and come back if you have some problems. You can only be new to the game for so long.
Main Campaign is very forgiving so unless you make some cardinal general mistakes such as not capping resistances (in higher difficulties), not having Resistance Reduction altogether, not having any form of Healing, you’ll be fine.
But if you want to be optimal, you can follow some top build from forum to the teeth. And lose your soul in the process.