The story will pick up wherever it stopped, that's pretty standard, so yeah Mor Dhona. Not that logging out in Mor Dhona would save you more than a few seconds anyway, shit's pretty pointless, it's like ppl asking where the RDM and SAM trainers will be so they can log out there, like, why? There's no race to cap and the 15-30secs you save isn't going to do shit when it'll probably take 20+hours to get to cap anyway.
Personally probably spending the first 10mins just turning in quests and shit I have anyway. I kept most of the dungeon quests for content I hadn't cleared after clearing the dungeons so I can turn them in for a little bit of xp. Not much but might help with less grinding at some point.
Gonna level as SCH, kinda sucks for my plan of leveling my monk second though since that'll be when a lot of SAMs/RDMs will be leveling too. Hope the FATEs and stuff aren't too shitty.