Penis not inserted in vagina. In vagina.

I'm a newly married boy 30 year old I m trying to do intercourse but my penis is not inserted in vagina I have a foreskin on my penis my penis is come out when it pull back my skin my skin is easily got pull buck with any problem but the problem is that I m not able to insert in vagina when I try to touch vagina hole bcz of skin my penis skin head got bend and than erection loose even I applied a lube water based lube on penis skin also but i didnt apply on penile head i apply only on skin without pulling back when I m trying to pull back my skin touch the vagina hole and then bend and erection loose after few min even after doing tha firstly I do foreplay 1 hour bcz my wife vagina got wet and easy but due to my this I am not able to insert penis in vagina Can I have to try a tablet to do intercourse first tym I am sad about that how much tough is sex in real lyf I m not able to insert my penis in vagina.