Hi! Welcome back to the game. Since Stormsblood a LOT has changed so it's pretty easy to get overwhelmed. You're best bet is to pop over to the Zalera world forum and peruse the boards there for a GC that fits your needs. Also, don't forget to make use of the Novice Network (Just shout out in game to get someone to invite you) as this is a really quick way to get questions answered and meet other new players/returners.

Good luck!