Lost v, can’t cum yet but making her Orgasm no problem

I need some advice and I don’t know if here is the right place tbh, but I’ll try anyway since all the feedback I’ve had here before has been great.  I recently lost my v to an older milf a few months back, and we have insane sexual chemistry, we keep seeing each other and the dynamics are fire. The issue is, I’m experiencing the infamous can’t cum problem most guys get when they first start laying pipe, most definitely due to being not used to the v and being a “hand” guy up until now. The good news is I do everything else right, I make her cum with my hands, intense kisses, but my penetration technique needs work, it’s hit and miss, sometimes i cant Even find her hole in time and get flaccid, and I ain’t really feeling too much stimulation by the vagina yet though it’s slowly changing, it ain’t dramatic. basically I’m doing 90% of the stuff by the book, to the point where she doesn’t even believe that it’s my first few times, but the penetration and the cumming part are something I need some fixes with, maybe it’s just a time thing? Keep at it until it falls into place? No doubt some performance anxiety plays a part.