What else do I need?

  1. Keep an eye out for the discounted lifetime membership in December.
  2. Learn about userscripts in the API and third party apps category. Install wanikani ultimate timeline, self study quiz as a minimum. There are plenty of other good userscript suggestions if you read around.
  3. Here is a link to a MIT course for Genki readers. That might make the grammar study more interesting for you.
  4. Don’t go overboard with resources. You have more than enough suggestions here.

Addit: include the link for MIT course using Genki