What is the most logical next event?

How to persuade your parents to let you go to a concert by yourself
Have a detailed plan in advance.
If you want your parents to let you go to a concert, it's best to create a plan many days, or even weeks, beforehand. Figure out the logistics way ahead of time so that you'll be able to answer all of your parents' questions.
Having a detailed plan will make your parents feel more confident about allowing you to go, as will knowing that you've thought about it far in advance. Give your parents information about the band.