I experimented a little with Lisp in Vim this year but I didn't get the point of the various plugins for it to be honest.

All I did was set up two keybindings; one that opens a terminal buffer and starts SBCL, and one that copy-pastes the expression around the cursor into that terminal buffer, executes it and jumps back. Worked surprisingly well and allowed me to edit Lisp code in a file while being able to quickly run it on the side.

I do recommend using a plugin like rainbow parentheses, I find that helpful in all languages but especially in Lisp.