Hi! I’m 12 and I’m a virgin I just noticed

Patient: Hi! I’m 12 and I’m a virgin. I just noticed a very small, tiny skin-coloured pimple like two days ago, and it has a small black dot in the middle. I never shaved myself and I don’t know what’s the black dot about. I’m very worried about it, for fear that it’s cancer or STD or STI or whatever serious disease. Can it also be puberty? PLEASE HELP, TELL ME WHAT IS IT AND HOW TO SAFELY CURE THE PIMPLE.