Digital Harassment

About a year ago, I got a text from an acquaintance. His name was B and he was 14 years old, but I pretended not to know. I was also 14. I asked who he was, and he replied “im ‘belo’ but you need to keep secret”. He asked me if he could send me a ‘picture’, he wasn’t specific about it. I was clueless at first. Then he said  did you touch d*ck before? “, I was starting to get suspicious. So I asked him again ” what picture?” and then he sent a picture of his penis. I got so angry, I called him a few times and he didn’t pick up. Then he claimed to be a youtuber, and he’s just doing this for a video. I told him that I was going to report it the police, then he apologized and said that he was just doing that for fun.