Your Husband, will have to held with the Eldest child.
Then you mind the baby.
Since you will be nursing that baby.
It requires, BOTH parents and the Husband helping.
So I hope he knows that?
Then, IF you have the infant in the same room as your eldest, don't expect it to go smoothly.
The infant will wake the eldest.
Infants wake a lot.
Not all Toddlers like that nor adapt to that.
And you will have to, numerous times, go in to tend to the infant and nurse him/her.
That cannot be avoided.
Also keep in mind, that Toddlers will not automatically KNOW how to handle a crying baby, and getting woken up by one.
And some Toddlers are 'grabby' with a baby/infant, and will go to the crib, touch the baby and/or hit it, bother it etc.
So, don't "expect" your Eldest, by default, to just know how to act, older than he/she is. 2 year olds, are not equipped to automatically be all good and quiet and stay still as a statue, in bed either. Nor quiet.
So the toddler may wake baby, or the baby will wake the Toddler, per the baby's crying and waking and needing to nurse.
To me, its not a good idea, to put infant in the same room, as the then 2 year old. They have no fully developed impulse control at this age, and they have their own age related phases they are going through, and needs.