What does sex feel like?

So me and my boyfriend want to have sex for the first time soon. I'm a virgin, he isn't, so he told me he would be careful and understands that I'm not experienced. We are both really ready, but I've seen his 🍆 already before, it's 9 inches, if that matters. I'm scared because it's literally so big, like what if it hurts or I get hurt? It's going to be my first time, obviously. And I'm really nervous. He tells me not to be nervous and says it will be alright. But I'm like kinda scared and nervous about it. How does it feel for you ladies? Good? Bad? Painful? Let me know!!