Is it normal for a male to not to eyaculate on their fist time?

OK so first of all I don't know if I was supposed to post this here so apologize if this its not the right one, so to my story I'm a 23yo male who just had sex for the first time with my gf to describe my question a little bit of background, my gf has more experience than me even tho she's 25 she had more partners before , I was a little nervous even tho she's my gf I never been naked in front of another person before, Im a little overweight and she's just average, so not been comfortable with my body might have something to do with my performance, I was very tense focusing on "what if" my penis doesn't work "what if I can't last more than 10 minutes" being the first of my doubts the main one so she start with a BJ which to my surprise I didn't had any problem with my penis even she was doing all the job she was really letting me explore her body and making me learn what I enjoyed the most like kissing my body, kissing the neck, giving me a BJ every now and then, I was like a real Virgin touching my first pair of boobs, which I really didn't thought it was that soft and discovering a vagina for the first time when we come to the actual penetration I was solid like a rock and not exactly in the good way I was a tense focusing on my penis to be as erectile as possible and trying not to cum which was working but I wasn't really enjoying the moment she was very kind kissing different parts of my Body which I enjoyed, trying to make me feel comfortable, so fast forward 40 min pases when I notice she was a little uncomfortable trying every position for me, I went on top of her and then she was on top of me then she do the reverse cowboy, we kissed in the mouth for several minutes to see if that could make me cum and after seeing the awkward moment I was making her go through my penis started to get flacid and that's when I wanted to just end, I told her I had just cum and fake and orgasm she finish me by kissing my neck, the only thing I really enjoyed and I was near to cum was a BJ she gave before I got flacid again, she made me feel some really nice sansation like the BJ or kissing my pelvic area or just my neck in general, so this bring me to my question was my first time normal? If you can call it normal? Is there something wrong with my penis or me for not been able to cum on my fist time? It was a mental thing? I was definitely trying to get as erect as possible so I assume that was my first issue and not enjoying 100% my experience, there was another time when I was enjoying the penetration but I was for a briefly moments and the its just got away

Thanks for reading this I know it's to long but I wanted to describe every thing I felt and what I didn't felt on my first sexual relationship