Help dildo

I have had sex once and we couldn’t get it in. But I can use tampons/fingers/ and the small side of my vibrator dildo pretty much with no problem. But I can’t get a penis inside or the bigger side of my dildo in. Can y’all give me some tips or something to help me out? I’m feeling very discourage and idk what to do. I want to be a belt o have sex. It feels like I’m a hitting a wall. Am I doing it wrong. I don’t think it’s vaginismus since I can’t get smaller things in.

But I do have extreme hip problems such as I don’t have a head of my femur and don’t have the right hip bone. I don’t think this has anything to do with it but idk