Wondering if this is transferable to the pursuit and maintenance of a long term relationship possibly leading to marriage.

Never had a problem getting women. Been a piece of shit womanizer for most of my life. I'm 38 now and regret talking shit to those of my friends who married and started having kids in their early 20s. Lots of regrets here. Not to insult others who sleep around if thats your thing but I feel guilty for my former ways. For using women, hurting them, leading them on, etc.

Have a string of failed relationships. Want to settle down with one beautiful women and have many children.

I have tried two routes. I have tried entering the dating scene being upfront and honest that I want a relationship that will lead to marriage and kids. All I get is women who aren't white (not interested... I want my kids to look like me), women I am not attracted to, women with tons of baggage, and/or women who are too old to have much fertility left.

The other route I have tried has been meeting women without straight up mentioning that I aim for a wife and kids, but just taking it easy and getting to know lots of women without that sort of pressure to see where it leads and think of the relationship stuff after. With this route I have met with younger and more beautiful women, but I haven't been able to create anything permanent, and while they often claim to want to settle down after they have gotten to know me a while, they shy away from marriage/children talk.

I have been trying for 6 years. I am in good shape, decent looking, decent job, able to support a family.

Yes. It is transferable to a long term relationship. You be an interesting, non-needy guy, except that at the end of it you don't use them, hurt them, or lie to them. Why not go back to what you were doing before, but leave out the last part?

If you want your kids to look like you, have you considered a blood relative?