Well… I think it’s probably a good idea to focus a bit on building a vocabulary before you start with grammar (that way you can focus on the grammar points being taught without looking up every single word). WK will do parts of that, but you’ll have some gaps, most obvious will be the kana only words.
A good resource for vocab is the Core6K/Core10K anki decks, or the paid site iknow.jp (both use the same material).
For grammar I personally used Tae Kim’s guide to Japanese Grammar, combined with an anki deck to drill myself on what I’ve learned.
Once you feel comfortable doing so, I think you should also look for some native materials (books? manga? games?) to practice reading. I think a good idea is to have some candidates that you want to be able to read and then look into them every once in a while to see when they start making sense to you. For games you can look for let’s plays (実況プレイ in japanese) to have a look. With books or manga you can either search for reading samples (立ち読み in japanese) or see if it has a look-inside feature on amazon.jp.