Self help scripts

Do you mean self-study script? If yes, then you can click on options, then go to items and select “Level” there. If you hover over it, it will give you some tips like putting +0 to have your current level, etc.

There are also additional filters that you can find useful here - [Userscript] WaniKani Open Framework Additional Filters (Recent Lessons, Leech Training, Related Items, and more)