It's technically possible but it's not advised. Following the story is pretty much required (almost all level 50 content is gated behind the main story quests) and the story forces you into dungeons fairly often.
It is not my job to be right. It is my job to be wrong in new and exciting ways. - James Kennedy Dame Amethyst - Knight of the Order of Odd-Fish
this game has the duty finder which puts you in a group with other players queueing for the same content as you. it's easy and hassle free and depending on the server you choose it doesn't take nearly as long as everyone wants to make you believe, even as a dps class. so if you were concerned about having to find a group yourself to do anything that should solve your problem. this game is extremely casual friendly in general