That's the problem with the game though. You have to get to the end in order to unlock the content that makes it enjoyable. Optional dungeons? Have to reach that point in the story before you can unlock it. Beast tribe quests? You have to do the story. Roulette? You have to have unlocked those dungeons through the story and complete them first. Everything is tied to the story and you have to do them before you even have the option to do other things. You only have Leveling and Guildhest roulettes before that and the number of dungeons available is very small until you complete more of the story.