Hi Jackobs,

This is the perfect place to post this question.
I think it is possible that he is getting some resistance because of an intact hymen, especially if you have not had any penetration before. I would recommend trying some dilators before attempting intercourse again. It can be so helpful to know that you can control and insert something inside of you, before having intercourse.
If you purchase a dilator kit and are having trouble with inserting the dilators, then seeking help from the pelvic floor PT would be a great idea.
Your partner might just need to push a little harder, but if you can dilate before he does that, it will make it easier for him to get inside of you. Your partner can even help insert dilators for you if you are comfortable with him doing that.

You are not alone in this, let us know how it is going.