I've got a 13 month old. Lots of good advice above.
Dont put pressure on yourself to be perfect. The only things that really matter is keeping the baby alive: fed, changed, etc. Baby proofing can come later, they cant get into anything for a number of months anyway, but you have more time to focus on it now.
Exercise bike is the easiest workout if you'll be alone with the baby. You cant leave to go for a run, so you can exercise bike while the baby sleeps.
Also, anybody who tells you the baby wont sleep through the night needs to be ignored immediately. Yes, some babies are colicky, and that really sucks. But if you follow an age appropriate sleep training system and stick to it, it works for the vast majority of babies. Sleeping through most nights should happen by 2 or 3 months. Stick to the system! You'll be a better parent if you are getting 8 hours of sleep.
Our baby basically did 1 hour per week. So 6 hours at 6 weeks, 8 at 8 weeks, etc up to 12 weeks. This is actually pretty normal for people who follow the schedule.
I wish somebody had told me babies were nocturnal when they're born. Reverting them to getting more of their sleep at night is hugely important to working towards sleeping through the night.
You'll go through a ton of diapers initially, just accept that. They will slowly start pooping and peeing with less frequency, but larger amounts at a time and diaper changes can become less frequent.
I use reusable diapers. I bought Alva baby brand. 12 diapers cost me 90 bucks and we have used them the entire time. They leaked about the same frequency as disposables for the first 6 months or so. Now that he is bigger, they don't leak at all and poop never extrudes out of them. There are other brands that are basically identical.
We use disposables when we leave for the weekend or longer, or if somebody is babysitting him who isnt familiar with the reusables. We also use disposables at night, since they absorb 12 hours of pee better. Seriously glad we took the uncomfortable leap to try reusables. If you have laundry in your house, they're the right choice. If you dont, they would be much more inconvenient and I'd probably go with disposable.
Anybody who tells you formula is for quitters can go F themself. That attitude is a huge problem in pediatrics. Babies literally have starved to death when parents tried too hard to stick to breastfeeding. We made it an entire year without formula, but the baby being fed is so much more important. Yes, breastfeeding is natural, and if possible it's great. But you know what else is natural without modern technology? A high infant mortality rate.
Careful about how you hold your baby. You'll be holding it A Lot. Ergonomics is important. I know somebody who developed severe carpal tunnel from holding their baby awkwardly, now they struggle holding their baby from the lost grip strength.