I drew the blue 4 Restlessness card. This shows a woman giving the rules of swimming to her son on the beach, while he just wants to go swimming with his friends.

This card tells me that you look to your band as an outlet for your Restlessness that you feel. I see a woman of authority in your life that is serious, and wants you to be more mature, and serious. But you are person that loves to have fun, and not take things quite as seriously. The woman is giving the boy rules for swimming, and the boy is wearing a floaty. But nearby his two friends are playing in the sand.
I see this is the woman wanting you to do one thing, but you wish to do another, like play in a band. I see the two kids playing in the sand building a sand castle, so your band is kind of new in the works and you want it to be successful. This will depend on the collaborative effort of each person that is doing the building on it. The question is what will you choose to do? Will it be build a sand castle with your friends or take the safe route of wearing a floaty and going swimming? Sometimes others can want more for us than what we ourselves want, but when it all comes down to it, it is our decision what we will do with our life.
Recognize that the people in our life mean well, and they only want what is best for us. Often changing our approach with others, will help them to see that you are doing what is right for you. With this card being the Restless card, this band could be a temporary outlet for you to explore your inner satisfaction, but tommorow it could be something else.
Your cautions are: endless arguments that don't go anywhere, over explaining things, and always doing the same things in the same way, or getting stuck in a rut.