As a traditional man in a relationship, you’re more like a father-figure than a spouse. After all, your traditional, submissive girl is closer to an emotional toddler than an adult, so you have to be the one to guide her.
Be sure to use the BAR system with her – give her Boundaries, shower her with Affection, and give her a strict Routine to see her blossom.
Good fathers use the BAR system with their children to see them grow up healthily and you need to do the same with your girl to see her thrive.
You’re called “Daddy” for a reason.