ok so after i beat mailstaire today i went and talked to merle but after that nothing happend i dont have celestia or anything i am a level 47 any help or advice? and i still on a part of Grizzleheim that still needs to be done i think im in ravenscar ....do i need to complete this to move on???
You're going to need to go back to the areas where you skipped side quests and complete enough of them to get to Level 48. Start in Dragonspyre, where the experience is highest, and work your way backwards through the other worlds until you reach level 48.
At that point, I recommend that you finish your level 48 spell quests. At that point, you'll have somebody wanting to talk to you that will eventually send you to Celestia.
Grizzleheim doesn't give much experience, so if you won't want to do anything in that world if experience is what you want.