I promise you it definitely does get easier!
22 months between my two....when I was pregnant with my second child, every single person told me that the second was so much easier, he would just 'slot in' etc. God knows what I was expecting but it was not the harsh reality of having a newborn baby and a toddler. Honestly I think I just survived for the first 6 months or so, I felt like a failure and it was just so bloody hard. I felt guilty that I couldn't just sit and cuddle my son for hours like I did when my daughter was a baby, and also felt guilty that I couldn't do activities and things with my daughter.
I k ow everyone who has suggested slings is doing so with the best intentions, and everyone suggested the same to me, but like you they weren't some life changing thing that suddenly made life easier, so I totally get you.
I tried to do lots of play dates - mainly inviting mums and kids round so my daughter had someone to play with for an hour or two. Luckily my daughter started getting very into the Toy Story movies at this time so we were also able to flop in front of the TV for a bit watching that together. I also had a box of fidget toys for my daughter that I'd bring out when I needed to feed her brother. It got easier when he was big enough to sit in a high chair, he'd sit with some of those toys that stick to the highchair while me and my daughter would do some baking together.
I found going out with both children really, really daunting and in hindsight I wish I'd pushed myself to have gone out more and built my confidence up. It probably would have made my life a little bit easier.
It feels really hard just now - it is!! - but it won't be like this forever. I promise!