You should stick with WK, but take into consideration that’s for Kanji.
So while there’s vocab that you’ll learn in WK, it’s by far not enough, not even the most common vocab, or presented in an orderly fashion.
Because after all vocab here it’s designed to reinforce Kanji learning 
I would suggest you to try putting some context to whatever vocab you are learning at least right after you cover the most basic of grammar.
This could mean grabbing your first graded reader or do something wacky as this 