Good luck dude. As you see here, everyone will have an opinion…but honestly I spent the first year trying not to accidentally kill them, the second year trying to ensure they didn’t kill themselves, then at 3 I was back to trying not to kill them.
You’ll be fine…though I will fully agree that sleep training in their own bed is critical. Want to have sex again someday? Keep the kid out of your bed.
A mistake I made with my first kid was getting caught up in “I can’t wait till…”. Can’t wait until they can sleep all night, or feed themselves, or walk, or get out diapers, etc. All with the goal of ‘getting back to normal’.
There is no going back. Embrace your new normal while trying to take it all in occasionally…that grouchy, half-asleep, 3am exhausted feeding watching reruns of Mythbusters will become a core memory.
As my pediatrician said when my son was 3 days old: “long days and short years”
PS: Watch out for PPD in your wife/partner, be an involved husband/father, and let any intense relationship shit roll off your back the first 6-12 months.