I know there are 2 readings and since I knew the first one for sure (and since it was easier) I decided to enter the second one, but that apparently was wrong. Did I do something wrong or should I always enter the first reading?
Yes, instead of きゅう (kyuu), you typed きゆう (kiyuu). The size of the ゆ is different. They aren’t pronounced the same. There’s a guide on how to type all the hiragana in the FAQ.
Welcome to Wanikani!
You will get the hang of how to type hiragana very quickly. Eventually, you will get to more unusual characters, like づ, which may give you trouble again. But there is lots of help here.
Just do your reviews, and you will be fine!
Since you’re just starting out, I would highly recommend knowledge.wanikani.com/ I wish I would’ve known about it when I started out (not even sure if it was around then?) It’s a super helpful resource and a great introduction to WK.
As well, welcome to Wanikani! Please enjoy your stay!
edit: I just realized it’s the site that Leebo linked to to start things out. So I’m just gonna second Leebo and leave it there
Just wanted to let you know that I made this very same mistake on my very first day here and I was incredibly embarrassed and looking back, I laugh about it all the time. Keep your head up and best of luck going forward, you’re going to do great!