I'm at level 47 now - is that enough to complete the game?

I'm at Chapter 15 but tried going to (SPOILER)Insomnia and got my arse handed to me, so I've gone back to level up.

I think I might complete the game and then start afresh now I know the game's intricacies, and start doing side-quests and hunts from the beginning. I kind of launched myself into the story straight away