I think part of the trouble may be that it comes across a bit as you wanting a woman for what she can give you (kids, contribution to the income, her physical looks etc) rather than for herself and her own personality.
What personality traits do you like in women? Do you want someone funny? Feisty? Clever? Kind? Etc.
And what fun stuff would you envisage doing together? Gaming, cinema, walks in the country, exercising together, whatever.
For example, the guy I am currently seeing and I spend a lot of time chatting about books, films, music, our pets ..... I am not saying you have to like exactly the same things as a partner, but at least a few shared interests can give a good starting point.
And while it's fine to be intentional about dating to a degree (and I imagine many women around your age who also want kids will welcome it), just be careful not to make her feel she could be just anyone who is single, attractive enough and of child beating age.
A woman is likely to want to feel loved and desired for herself, not just for what she brings to the dating table.
As for your virginity, I won't lie, it would put me off. But I am not the sort of woman you want to attract, as I am sexually adventurous with a past you might find off putting, so that's fine.
There will be plenty of women around your age who are either virgins themselves or have only had one or two previous partners, who, like you, see sex as something to have in the context of a committed relationship only. For such women, I imagine your virginity may actually be a plus.
Out of interest, are you religious at all? If so, you may have luck on dating sites specifically for people of your faith. My friend met her husband on a Christian dating site, and he was a virgin and around your age, if not a bit older, due to his beliefs. It could be worth exploring.
Good luck!