Losing your virginity does not hurt as long as you know what you're doing, which is why there are so many girls getting hurt! There could be a slight discomfort at first when the penis first enters. In order to prevent this you could provide extra lubrication for your first time or different relaxation methods.
Before losing your virginity you should experiment with yourself so you know what you are doing. I suggest for all young girls to look at their lady parts in a mirror and examine what is what on themselves. If you know your own body, it's easier to teach others about it.
I'd also suggest inserting things into your vagina. Nothing strange, just fingers or things penis shaped so you can get an idea of the way that things will feel. It isn't strange to experiment! And if it is strange, it's stranger to not know what's going on!