Does anyone else feel guilty?

I’m 13 and I masturbate by like humping a pillow bc I’m too afraid to finger myself. I just can’t find my vagina(I haven’t tried to use a tamping either). Anyways after I like kind of orgasm or feel “plesured”, idk, I always feel really guilty. Why do I? And how do I not feel guilty? Also is it okay to masturbate everyday?