Delay online assessment for Amaz on?

I had a recruiter from Amazon call me today and say she was going to send me an online assessment to complete. The thing is, I don't feel ready at all and really need to study lots of LeetCode. Is it

I had a recruiter from Amazon call me today and say she was going to send me an online assessment to complete. The thing is, I don't feel ready at all and really need to study lots of LeetCode. Is it possible to ask her to delay it? Ideally I'd want a few months to practice lots and lots of LeetCode and LP questions, but idk if that's possible. Also, anyone know what language you have to use for coding? C++, Java, or something else?