I don’t think it’s a good idea. Most BT’s and gerim are not 100% integrated by the time they’re 20-25 years old. They maintain a lot of their weird quirks and judgementalism for the first several years.
I think there’s an argument that marrying a FFB or a semi-FFB would accelerate the integration, but I’m not sure that task should fall on a normal (non-kiruv) person unless they really want it to.