Go slow. Make it fun but take your time. Be vocal with your partner. Lots of lube and time and it will make it enjoyable. Communicating with your partner is the most important part. It hurt some for me in the beginning, a good hurt if that makes sense... but my husband took it easy and it's actually something I enjoy now. But it's also not for everyone. I have friends that had bad experiences with trying it and refuse to. So experiment and enjoy, if you don't, stop and you know where you stand on the topic.