19 months between my DD and DS.
I tried the sling but DS didn't like it. We used the double pram Britax B Dual and I have found it excellent, sturdy, not too heavy, with lots of useful seat combinations (infant carrier up, normal seat down, normal seat up, facing different ways, reclines etc.) .
I didn't do much cooking initially, food was always something basic like salmon in the oven with some sweet chilli sauce (you literally just pour over, put it in, take it out 20 mins later), Uncle Ben's Express rice (2 mins in the microwave) there are lots of different types including wholegrain if you're health conscious, and steamed mixed vegetables - takes 5 mins on the hob. We ate various variations of this for the first 6 months (different fish or chicken, basically).
I used to bath them together - I used the routine from a book called 'The Second Baby Survival Guide' by Naia Edwards, it was very helpful.
I didn't have a strict schedule, in fact some flexibility helped as I was not getting stressed over not meeting the day's milestones like being dressed before 10am
I used CBeebies, toys and books to help me entertain my toddler during the endless hours of breastfeeding. The main problem was tiredness, I was shattered during the night feeds and would also get a major crisis around 3-4pm (was somehow always feeding time too), so I used to read Mumsnet on my mobile to keep me awake (while chatting to my toddler to keep her feeling involved). For me, it WAS the only way to not drop off as I was simply overcome by sleepiness.
Now they are 20 months (DS) and 3 (DD) they are very close, very attached to each other. It was the best thing we ever did and I hope you will feel the same way OP :-))