Two first timers are like monkeys in a barrel. Bumbling all over the damn place, jamming this here, sticking this there. Make the lady comfortable. Are you using any lubricatory aids? I would think that, under the circumstances, it ain't the Nile down there. Take your time, work up to it, and it will all be fine. FYI, the standard hymen depth is 8.8". Just kidding...don't over-analyze...it's meant to be a GOOD thing