Thank you all for your replies.
Jaja, I've actually kind of changed my mind a bit! The reason I suddenly panicked about having an Ateji was because a Japanese friend of mine had told me about a (foreign) coworker of hers who was rejected by a job without even being interviewed because of her name, which was written in katakana. I was worried, but thank you all anyways for taking the time to comment.
Apologies for wasting time!