Hiya everybody, so returning back after giving it a brief stint at release and loving the changes so far

I just hit lvl 15 today, which is the highest I've gotten so far in this game (yeah...clearly I didn't put alot of effort in the first time around...) but my question is what should I be doing now? I mainly just got to 15 off solo grinding, leves, and missions. Should I keep doing that or start looking for groups to grind with? I've heard about something called Shposhae that I should do for gear, but I ventured in and there was too many clusters of aggressive mobs I felt like it probably would have been a bad idea to run in there tossing out spells. Should I have a group for that as well?

I played FFXI a decent amount so I can assume that at some point I'll mostly be focusing on grouping and lvling, but it just seems a lot less rigid in the order as FFXI with the basic "lvl 10 go to Dunes, and continue from there." Any help is appreciated, oh and also if any LS are willing to accept a lowbie on Mysidia let me know I'd love to join!

Thanks in advance!