Why don't you just comment out all the keys in the config you won't use? Is it really that hard to keep track of keys for i3? All you really need for basic usage is:
>open dmenu
>close window
>switch workspaces
>navigate windows
>move windows
>reload/exit i3 (just in case)
Once you are comfortable, you can enable different window types, open terminal, toggle floating, shortcuts for macros, and the like.