I don’t know where this “statistic” came from that “most” boys who come out of the freezer are not ready to date or marry. Any boy or girl who has been raised in an emotionally healthy home and has observed their parents conduct themselves as spouses and parents and has had normal interactions with their siblings of both genders while growing up are usually pretty well prepared for the give and take of family life. They have been practicing the acquired skills necessary for creating a positive relationship with a prospective spouse.
Before looking for a partner, the most important thing to have is a clear honest understanding of yourself both emotionally, and intellectually, and then you will know what you need in a partner.