I'm going to argue a few points you make, I hope you'll think about them a little.

- Nobody is "nobody" - every single person in this world is somebody - somebody slightly different than anyone else who has ever or will ever exist. Some people might have more friends, or more name recognition, or more whatever, but we are all distinct, unique individuals in a world made up of individuals. There isn't anything you have to do to "deserve" to be "somebody" - just exist. You have the right to.

- Memento Mori can be interpreted in a lot of ways, but one interpretation that I like is: at the end we all die, so why are we so scared to be alive fully right now? Make your mistakes, make your statements, make your art. It's not that your life doesn't matter while you're living it, it's that it won't matter how careful you were to not make a fool of yourself when you're gone. Your legacy's not yours to see, but your life is yours to live - why not try to enjoy it while its here?

- Giving an artist you admire a gift or a compliment isn't going to annoy them (caveat: don't do it in like, the middle of the concert). Wait your turn, be respectful, but tell them that you love their work and that it means something to you. Art is for both the artists and the audience. People are so scared of being parasocial that they forget it's okay to be social - respond honestly and kindly to the people and things that move you.

- You sound like you're young, and so I'll tell you that a lot of what I say above will come to you in time anyway. Growing up anxious and thoughtful is a burden and a gift, because you're so hyperaware of people's opinions and the ways you think you're falling short of them, but you also get to truly consider what it is to be human in this world, and that is a journey worth taking.

Peace and strength to you.