Advice needed for genital differences between my partner and I

I have a downward vaginal canal and my boyfriend has a downward curved penis. We’re struggling to navigate this.

My boyfriend and I both 21 lost our virginities a month and a half ago and are trying to navigate our sex life. There have been some difficulties because he’s big and thicker than average while my hole is kind of small. I see a gyno next month but was wondering if anyone in a similar situation had any advice for us. Thank you