[MF] First time and it didn’t go well. Any tips?

If you see this post and you have the time to read and write a response I could use some real help.

So backstory on this. My partner and I have been looking forward to sex for MY first time. I was out to go check up on her and see how she is. So we were cuddling at her house when we both got very horny. We didn’t have condoms so we went to a Walgreens and bought some. We come out and decide for some reason car sex is totally a great idea for my first time. So we drive to a very empty parking lot. We get all excited get into the back seats and undress. The thing is once we started it got a little rough and the condom tore (bad thing number one). We got rid of it and grabbed another this one thankfully did not break part way through. We went right back to it just not as rough. So to skip some details I fingered them a bit. The thing is that I noticed that when I looked at my hand it was slightly darker. We turned on the lights to find out she was bleeding (bad thing number 2). We cleaned up everything wiped off the windows and I dropped her back off at her house after some aftercare with eachother. I get home very upset with myself that maybe I fucked up in someway. We both discussed over text and call for a while like tips and tricks for next time. The entire time I had to really fight the urge to say sorry a million times.