First of all, forget about the que times. They got much better now for DPS. I used to main SMN and I'd que up with my bf who was MNK. We waited for a bit but damn it was so much fun when you got to BLOW EVERYTHING UP. If you prefer the tank role and running in and taking all the damage, then do that. Personally, I find tanking boring. Once you've settled for a role, then you can start thinking about a job. Don't stress your way to 70. Fill in MSQ with dungeons you unlock along the way and it will be fine!