I had this.
My top tip: get out the house once every day. Even if just to walk around the block. Everyone needs the change of scenery.
Bath time, I found, was an evolving thing. Something worked for a month or two, then both had grown and we changed it. To start, I'd bath DD2 with DD1 in bath but playing, then bath DD1 while DD2 sat in bouncy chair in bathroom. Then feed DD2 which knocked her out for about 20 mins during which I'd read DD1 a story and put her to sleep. It worked like clockwork as I've described oh, about 1 night out of 7.
I agree with finding groups, definitely a good to have "stuff planned".
You can read storys, or just talk to your toddler, while feeding the baby. I worried about that but it turned out to be the easiest bit.
A sling was also a lifesaver for me - was a "hands free" kit that let me hold the baby and play/get stuff for my toddler. This was a wrap sling (moby wrap) so DD2 couldn't fall out or dangle.
Good luck!! It can be a tough year but I am very happy my two are so close together. DD1 can't remember life without DD2 and they are very good friends now at 4 and 2.5. And, best of all, we are nappy free, cot free, changing bag free and nearly buggy free!!