I have a two-year ago gap (almost exactly - birthdays four days apart) and then a 22-month age gap. It was fine OP, honestly.
I never had a double buggy for lots of reasons, but others will swear by them; you need to make your own choice about that. We used a combo of sling and pushchair or pushchair and buggyboard.
DD used to sit happily in her bouncy chair as a baby and watch DS1 run about. DS2 was just happy wherever, such an adaptable boy - well, he had to be, with a 3yo and a 1yo to be dealt with.
When you have a second baby, you do wonder what you did all day when you just had one. Babies as a rule do not need someone running about after them - feed, change, sleep, they are good. So you can attend to your toddler. Congratulations.
Agree with others btw, smaller gaps like this mean you never get used to not having a pushchair and all the baby and toddler paraphenalia about. A friend had a six-year gap (on purpose I believe) and of course had ditched all the gubbins and was walking out with a tiny handbag - then had to go right back to nappies and mushed up food. I couldn't have done that.