Be certain that you are actually ready to take on a wife and children. Women today are less likely to enter into marriage with a man who isn't ready financially, emotionally, or spiritually. I would say that you should ensure that you are an attractive prospect for a virtuous woman of sound mind.
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Are you established in a career or are you still trying to figure that out?
Do you have the prospect of being able to provide an adequate home for a family that is in a safe area?
Are you able to manage money wisely (especially important if you are a low-income earner)?
Do you have a good relationship with your mother or is it problematic? Is she clingy or likely to cause trouble?
Do you pray the Rosary daily? Do you have enough knowledge of the faith to lead a family in prayers and formation?
Do you support homeschooling or have the ability to provide a Catholic education through a school?
Are you physically healthy and able to perform the duties necessary for providing for and maintaining the household?
Are your friends married or do you hang with committed bachelors or those of dubious character?
When you go to Mass do you dress well, in a suit with clean dress shoes or more causally? This matters to many women as it projects an image of the man's character.
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These suggestions are of a more material nature but are things that a marriage-minded woman might be looking at as well as the other suggestions. If you are known to be good "husband material" ladies will naturally be drawn to you making your search easier.
This seems to me to be very good advice.
I really know nothing about this subject, but I speculate that you might want to look for a few signs:
She knows how to and likes to cook. She gets excited about learning skills like making bread or cheese or fermenting foods. This is a very creative and useful thing to put energy into.
She knows how to and likes to babysit, care for, and be around small children. She's had plenty of child care experience before marriage.
She has hobbies or skills that traditional homemakers once had, like sewing, crafting, etc; and/or enjoys taking care of the home in which she presently dwells, including decorating areas that are in her charge.
She does not regularly engage in useless activities, such as shopping for no good reason, going to movies or any kind of arcade-like venues, or getting together with friends at entertainment establishments like restaurants or clubs on a weekly basis.
She enjoys being at home and doing homey things, and enjoys solitude and her own company. Being out in the world, rather than pull and attract her, is a bit discomfiting to her. When she's out there for any reason, she's glad to get back home.
She does not have a "career," and she does not have student loans, or for that matter, other kinds of debt. If she has been employed outside the home, she's been in a more genteel or womanly position, and she has kept her femininity intact.
This may get many thumbs downs, but when I am around young trad women, if I see that they have garish and long fingernails from a nail parlor, I lose respect for them. Conversely, I also dislike it when I see young women who do not take care of themselves in the looks department. You want someone who dresses attractively, yet does not signal vanity and self-obsession. Too much make-up, or a very glamorous appearance signals "high maintenance" to me. I remember a young trad couple that were dating. I thought very highly of the young man; and boy was he smitten. The young lady was absolutely gorgeous, like a supermodel. In fact, everything she did communicated that she was high up on a pedestal of her own making. Whereas he was friendly to all and really funny in groups, she was silent and was always trying to catch his eyes and attention. She did not mingle or show any cheerfulness or friendliness with the others. I said to myself, "Poor slob. He's a goner." Needless to say, I was relieved for him when I learned they had parted ways. I think he dodged a bullet.
Take note of the relationship she has with her cell phone. Is it out in social settings? Does she text when she should be giving her attention to the people she is with? If you have her number, does she text you throughout the day? Is she unable to leave her phone for any length of time? What kind of wife and mother would a cell phone addict make?
Ultimately you want someone comfortable in their own skin, and happy in their present life. You do not want someone who telegraphs that they think they need a man and marriage to be happy or fulfilled.
A godly woman, a woman who would make a very good wife, is already happy. When she meets a man she loves, her desire is to share her happiness with him - not use him to make her happy, as if he were an object or an apothecary.