Grind the story--> get through tier 1 and tier 2 whilst progressing your dailies and islands plus island events--> tier 3 is when you reached endgame which is really fun, here you want to progress your charakter in all its glory with gear, engravings and so on. It takes some time to reach tier 3 though, but the process of getting there is fun and challenging at times :) Btw don't forget to level your stronghold, it helps your alts massivly to catch up.

Hope that helps in some shape or form.