Up to you. Do you feel like wasting the time you already spent? Although, you did learn how the game runs, how to change and use the UI, etc., so its not a complete waste.
Can you level another job, craft, gather, explore? There is a ton of stuff to do, What boss fight are you talking about? Well that doesn't matter unless ALL boss fights are like that but even then, there is still a ton of stuff to do.
I would wait because I hate the idea of losing time and effort.