I'm glad that things are on the up and up for you. I am sorry to hear about your linkshells. If I were in your shoes i would try to find a nice social linkshell, one that you don't have to be too invested into; they come quite in handy and make game seem less of a grind.

As for which job to pick, I would suggest you rank up which ever job you enjoy the most that way it won't seem so boring in the long run.