My BF can’t stay hard and when it is, it’s so uncomfortable

Me and my BF are both virgins and after a while talking up the moment, we tried to have sex. It was great up until he tried to put it in and between the time he took to get hard and lining it up, it got limp again. He reassured me that it’s not me, he thinks it might be performance pressure. He also takes a while to cum just from head or hands, I haven’t been able to make him cum without help and there will be several times throughout trying that he’ll become softer.

There was a moment where I was on top that we were able to get it in, but it was so uncomfortable for me. I get the feeling that I’m just not used to something of that width being in me. It wasn’t helping that by the time we figured out the perfect angle and method, I was already tired and my vagina kinda went to sleep from lack of attention and just overall focus on his situation . I took it out just to relieve myself for a second but it went limp almost immediately and we couldn’t find the angle again.

I have no idea where to go from here. We want to connect with each other so badly but I’m worried he’s becoming insecure with his performance and I’m becoming worried that I’ll be in pain for it.