How to give head to a Virgin uncircumcised penis :)

So me and my boyfriend we have been together for a while and we’ve taken things slow but I want to surprise him by giving him head, now I have obviously seen his dick before so I know it’s uncircumcised and it had like hella skin on top of the head, when he like plays with is the skin just like stays over the head, now wtf do I do?? Like ion want to push down on that skin and hurt him u know? So like how tf do I suck an uncircumcised penis :(