So, in addition to ED i have a lack of experience. I was married, had 3 kids and divorced 12 years ago. With my then wife we used to practice cowgirl so it was easy. Now in my over mid 40s, with my absolutely amazing, sexy partner who is more experienced we have not had success in penetrative sex, although intimacy was in loads but that does not detract from the damage done by me not penetrating her sufficiently.
So, from my end, lack of experience is a huge problem. I can’t pracrice with someone else, obviously. How does one practice having sex?! Quite a predicament.