Don’t know how to talk about it

I’m 19 and I want to try having relationships but past experiences where I haven’t been able to get a full erection or keep it for long are stopping me from getting into situations where I could embarrass myself again. Looking for advice because I don’t know whether to try and then talk to the girl about what’s happening if it goes wrong, or if I should just tell the girl that I’ve been having issues before even trying.
Cheers

Have you tried any breathing exercises or methods to try fix this bro?

It happens to me with new lovers all the time. Breathe, do the kegels and try to relax. And do what this course instructs. It’s working.