Out of curiosity, how are you approaching learning it? Practical Common Lisp seems to be the most popular entry point for non-beginner programmers learning lisp.
Yeah, I decided to work my way through Practical Common Lisp. I haven't gotten very far yet, but I'm dividing my attention between that and a number of other things that I've been putting off for way too long. Like, as I sit here in front of the computer tonight before going to bed, I'm working through some of Learning R.
I started with Practical Common Lisp, but found out Lisp-koans (https://github.com/google/lisp-koans) support my flow of learning CL better, as I do some koans while commuting in the train :)
That's interesting; probably a learning-style difference, but the one time I tried a -koans (ruby-koans in this case), I found it to be a very inefficient way to learn.
To me currently the biggest learning curve in CL is that "how to use CL" e.g. list/vectors etc. and not "how do I use CL to solve X". To the former, koans are good way to get familiar with the syntax and how to use the language.