Feeling unqualified

Hi. I'm a soon to be husband (29/M) to my long time girlfriend. And I've been meaning to ask someone about this. I don't really have this kind of talk to my dad or to my brother but maybe a stranger will do.

Have you guys ever felt unqualified to be a husband, or a dad? I kinda see myself working 48 hours a day just to make ends meet, go home tired and wake up tired. The endless routine of being miserable. I was scanning the posts here earlier and there is nothing much in here but the wives complaining about their husbands.

I love my soon to be wife. Its kinda cliche because every miserable marriage starts with that phrase. How do I make myself better? I don't have vices, dont drink alcohol, dont smoke, dont do drugs, or women. I stopped doing console and online games. What's the hardest part of being a husband and what's the best part about it? I wanna see a silver lining of where I am going to. I want to convince myself that Im gonna be someone my fiance wanted to marry