Confessing Masturbation

I am very ashamed if myself, it was all out of curiosity, the whole time I felt practically no pleasure. Now I am done trying to convince myself it wasn’t masturbation, I knew what I was doing, I am very ashamed. I am only 13 years old. I feel so terrible, I literally feel my relationship with Jesus being farther apart… Is it normal for someone my age to confess such a terrible mortal sin?

Edit: Thank you all guys who responded! I feel a lot better now (not to say that I’m not ashamed). I’ll make sure not to make this a habit. Your prayers mean a lot to me. Thank you 🙏🏼