When the newborn comes into your life, everything shifts. It doesn't matter what your current habits are - your fitness, your diet, your time with your wife - it all kind of goes out the window. Everything starts shifting around the newborn: the schedule, the mayhem, the process of learning their personality and cues - are they hungry or just needy?
Then you start figuring out the schedule. In the first stage, you barely sleep, and both of you attend to the baby, which quickly becomes unsustainable. So you start adjusting, taking turns, shifting things around to make it work.
Everything shifts around the baby, and you end up giving up on the small things - even something as simple as going out for a walk, let alone exercising.
Two weeks in, though, you start to really enjoy the moment. You realise it's a new life - a new person with their own personality, thoughts, and habits. It's amazing to watch it unfold.
But it's also important not to forget everything else. Once you've got a bit more structure in your schedule, start bringing back those other habits - eating properly, going out, spending time with your wife, exercising, looking after yourself, and maybe spending a bit more time on your side projects too.