Fennel isn't a "real" Lisp. It's more of an aesthetic layer on top of Lua than anything else. Try learning Scheme.

Give me a break. What's not "real" about it? It's homoiconic, it supports connecting to a REPL, it has macros, first-class functions and proper lexical scoping. What else do you want, Guy Steele personally sending you an emoji whenever you install it?