I think learning vocabulary can be helpful for you especially with WaniKani, since I have learned a lot of vocabulary on WaniKani and had many “oh so THAT’s how you write that word in kanji” moments.
When you read and learn grammar, you will pick up even more vocabulary. Even better, you’ll know how to USE them. Turning yourself into a dictionary is less useful if you are not able to arrange the words into meaningful sentences, right? Word soup! The vocabulary will come as you study AND a lot of vocabulary can and will be inferred by context as you read—in many cases you won’t have to know EVERY SINGLE WORD in the sentence to understand what is being said.
In my WaniKani I do only 10-15 lessons each day. (10 if reviews are 80-89% and 15 if 90% or higher.)
I do my reviews first, then study all the mistakes I just made, then lessons, then review the items I just learned, then leeches, and then review the lessons from the past 4 days. All of that takes about 50-60 minutes. Then I do the 4-hour reviews for the day and that’s it.
There are so very many resources (even free ones!) available these days—especially compared to when I was first studying in 1999! Try as many as you can find and see what works best for you. I use Duolingo, which not everyone likes, but it works for me. I also use Drops, which is vocabulary only, but uses images and has themes that group similar words together (like fruits, feelings, numbers, colors, and so on). I found a couple of courses on Udemy (that were relatively inexpensive) and I used them to prepare for the JLPT N4 and N3, respectively. (Planning on doing the N3 in December.)
Some fun ideas you might like to try out:
- Someone in the community made this cool program where you can practice reading (and translating, if you wish) Japanese sentences. You can even link it to your WaniKani progress so you will only see kanji that you have already learned.
https://sakubun.herokuapp.com/
- There was also a fantastic article on Tofugu about graded readers.
I went on JGRPG Sakura Tadoku Lab and there was a test you could do that will help figure out which reading level you should start at. It’s a very fun test in which you’re given six words and 3 definitions and then you choose the words which match the definitions. It’s a bit like choosing synonyms, which is fantastic for vocabulary.
In the end, the route you choose to reach the level of understanding you’re looking for should be uniquely suited to you. And nothing says you have to stick with any one particular set of tools. You’ll make plenty of mistakes and you will get frustrated (we all do) and that’s okay. If I didn’t make any mistakes then I wouldn’t need to be studying because I would already know everything, right?
Wow that got … long. Sorry about that, but I hope you can find something useful in here to help you with your study.