This game is very solo friendly until late end game content. Any of the group dungeons you need for the story have a duty finder that will match you up with a proper party and get the dungeon under way. Communication is usually at a minimum in these. I'm lucky just to exchange pleasantries or maybe if someone is new someone else will explain a boss mechanic. So you will have to party up for the dungeons but it is a very automated process and most players have the dungeons on auto pilot so it's easy to play along with them even as a loner.