Sex not going to plan with new partner


my new partner and I have had a rocky road so far sex wise. We really love each other and I think she could be the one but the bedroom isn’t going well

She doesn’t have a lot of sexual experience so super tight and it kinda hurts me at times. I know this will get better after time but she is putting blame on me in a way and claiming I’m not attracted to her. We’ve tried lubricant and it helps to an extent but this situation and the pressure she’s putting on hasn’t helped my mild ed.

Anyone any tips or been in similar situation