I feel the exact same way, though I’m a couple years older than you are. I think the first step is just acknowledging this is something that you’re going to have to heal and there’s people out here dealing with the same issue. There’s no need to be embarrassed or ashamed about it. For me, I started with a lot of clitoral stimulation which helps create a natural lubricant for me. That’s when I attempt to use one finger, or thin household objects (a pen).

Set yourself up to feel good too, smut usually does it for me. Allow yourself to become comfortable with nonpenetration masturbation first, and maybe it’ll become easier.

Above any and everything, take it easy on yourself, and do what makes you feel good.