I have 20mo between mine.
My DD did not visit when I was in hospital, so the first time she saw DS. Was when we brought him home in the car seat.
I was very very lucky, family around to help and DH had good paternity leave.
Practical tips, when I was ready (after two weeks was lucky with a good birth) DS accompanied us to our usual playgroups and music classes.
DD continued with nursery two days a week. She also continued to nap well, leaving the newborn crying for a few minutes to settle her.
Bedtimes could be tricky but again, newborn left to cry in basket while she settled.
Cbeebies was a lifesaver, slings (yes, yes and yes to those). Accept all help, dress baby in baby gros and pram suit.
Invest in a good double buggy that will suit your lifestyle. I still push mine every single day for miles and they are 3 and 17mo now.
Plenty support available on MN.
Congratulations! It's hard, but does get easier quickly. Promise.