Not a parent but as a child of a father who took very shytty care of himself, the most important thing is to
A) not make excuses for time
B) be reasonable with your expectations
C) get creative
You’re going to be busy the rest of your life, but if you wanna be here for your child you need to be healthy, health is wealth.
Running a mile burns the same calories as walking a mile. So basically, on days where you don’t have it in you for a full workout, find a middle-ground, compromise with yourself and do something, when you can’t get to the gym do sit ups, push ups, dips at home. Get your heart-rate up to zone 2 and 3 regularly. You don’t need to be Sly Stallone, you just need to keep at it and be semi-consistent. There is no need to be ridged, just give your body what it needs that day.
And set a realistic goal for yourself time-wise. Maybe 4 hours a week. And have your lady do the same. Working out give one of you time to decompress away from the baby while the other gets some 1-1 time.
Above all else, watch what you eat and drink. Cut out alcohol if you can because a lot of what we put in to our bodies can undo the hardwork.
And avoid the baby snacks