This is readable and interesting - https://legacy.cs.indiana.edu/~dyb/papers/3imp.pdf Dybvig's dissertation (he wrote chez scheme) it's easy to follow.

IMHO, it's a lot easier to write compilers in Haskell or ocaml, for a bunch of reasons. you might take a look at https://wespiser.com/writings/wyas/00_overview.html which walks through writing a scheme implementation in Haskell.

Do what's fun. I think both of those are worth poking at.