In my experience, healer is the most in demand role right now. You can probably just message a group leader and offer to heal, but say you would like to roll on DPS gear. Or, you can start your own group and simply say the same thing to the group before you head to the dungeon.
So long as everyone knows what’s going on before the dungeon begins and they agree to go, there isn’t going to be a problem.
join a group as dps get kicked cause my dps is bloody horrible cause im mostly in holy gear
If you want to DPS, I would quickly do some quests/get some rep gear to build out a ret set–you know stuff that’s around level 78. Putting in the effort to execute your rotation will probably be more than enough to pull your weight in appropriate gear.