Definitely take a look at the Getting Started guide if you haven’t read it: https://knowledge.wanikani.com/getting-started/how-wanikani-works/
It takes a while to actually see the new radicals you unlock because of how WaniKani does lessons. When you guru radicals, it adds kanji lessons that use that radical (and any radicals you’ve seen before). When you guru kanji, it adds vocabulary lessons using that kanji, and you level up based on guru-ing kanji, not vocabulary. What that means is you tend to guru a lot of kanji at the same time, unless you’ve gotten a lot wrong recently, so you get a lot of vocabulary in your queue at the same time as you get a whole lot of new radicals. WaniKani prefers to show you vocabulary from previous levels first, which is why it takes a while for the radicals to show up.
There’s some advice here for building a lesson plan based around how much time and energy you have available, here: https://community.wanikani.com/t/wanikani-is-too-slow-and-the-radicals-are-useless-also-why-cant-i-just-level-up-in-one-day-instead-of-7/27040/51