You will probably want to add in a textbook soon, maybe when you’re closer to level 10, and then start using Anki (or an equivalent) to track vocab from the textbook and other beginner-level media.
Around the time I took those steps, I dropped KaniWani (equivalent to KameSame). It was taking up a lot of time, and the WK vocabulary it was reinforcing was not actually very useful in conversation, because WK’s vocab serves only to teach kanji meanings and readings - not to facilitate spoken communication.
You’ll want to learn and reinforce the standard word for “bathroom” (WK level 22) before you put in extra time on KameSame for “testicles” (WK level 5 - and it’s usually written in kana anyway).