There are two ways to answer this. First, people manage to do things like AoC in pretty odd and esoteric languages all the time, so doing it in elisp is totally viable. Is it advisable? Not sure. elisp really is technically a general purpose language, but it's really meant for constructing Emacs components and extensions. I don't think AoC would teach you how to do that sort of thing; it would only teach you how to write AoC type problems in a very odd lisp dialect that isn't much like most other modern lisps.
There are two ways to answer this. First, people manage to do things like AoC in pretty odd and esoteric languages all the time, so doing it in elisp is totally viable. Is it advisable? Not sure. elisp really is technically a general purpose language, but it's really meant for constructing Emacs components and extensions. I don't think AoC would teach you how to do that sort of thing; it would only teach you how to write AoC type problems in a very odd lisp dialect that isn't much like most other modern lisps.