Hello dogsmother 
Please, please give it a go!
She won’t mind me saying this, but Tilly and I were exactly the same.
I’ve actually got dyscalculia; and I honestly didn’t think that I’d be able to do it at all.
I get my Alexa to do the calculations, and even then I know I take much longer than everyone else on here. Sometimes over an hour!
And the fact that it won’t allow you to put in a calculation that doesn’t compute is a massive bonus.
I absolutely love Nerdle now.
Like muse and nadateturbe, I like it much more that Wordle; and I’m definitely a word person too.
Without sounding big headed, I don’t really find Wordle a challenge (I’ve got it in 2 over 20 times ?, I think that muse probably has too)
Go on - give it a go!