A.S.
My two boys are almost 2 years apart exactly. So, this is my advice:
Your older son can 'help' with the baby. It will help curb jealousy, and teach him how to be a good big brother and help him feel needed. He can help, by bringing you a diaper, helping get a blanket, help entertain the baby with peek a boo, softly rubbing baby's back... Also, when you are feeding the baby, your older son can sit next to you, hold the baby's hand, stroke his head, it will help keep him out of trouble so you won't have to go around chasing him, and he can get in some bonding time as well.
Give your older son some activities he can learn to do to entertain himself when you are needing to care for the baby, so he won't be underfoot or crying for attention. Learn to determine what his triggers are, so you can be prepared before they happen.
Another thing, is when your older child is napping... spend that time napping yourself with the baby. You need the rest. Then, wake up a little before the toddler and do chores or whatever you need to do.
Also, getting two children ready to leave can be majorly stressful, especially if it's during the day and you are by yourself. Get ready first, then the oldest, then the baby. Bring a little bag of snacks with you when you go out, and have a double stroller.
I got my oldest son a little backpack for his things that he could carry so all the baby items and mine could be in a single diaper bag. So much easier this way.
Or, what I did, was not run any errands until dad came home and I would take off by myself! Or, I would bring only one child, to give him a break from having to deal with a sibling all day. I take turns bringing one child for mommy/child dates out.
Also, you don't need to always double up on toys. If we had 2 of everything, it would be a nightmare. On some favorites we have 2 (like a magnadoodle since it's a good quiet toy for car/dr office/church), but letting them learn to share and take turns is much easier.
One last thing. This sounds silly, but when we go out, I dress my boys very similarly and in similar colors. It is easier to spot them if one takes off running and easier to dress them as well.