Depends what you want to do with it. Do you just want to pull apart a class and twiddle with its internal strings (e.g. to retrofit some duck-typing) or do you

Depends what you want to do with it. Do you just want to pull apart a class and twiddle with its internal strings (e.g. to retrofit some duck-typing) or do you want to manipulate the code? If the latter, I believe it is a stack based language, so go learn you some forth, first. If you want to implement some dynamic language running on the vm, then you need to dive in a lot more deeply than this.