Taking Geography + Music or just Music?

Hello-

I don’t know whether I should:

A) Take Geography in school, and teach myself Music (with sessions with a tutor once per month) out of school, taking both GCSE’s.
B) Take Music in school. Not take Geography.

I like both subjects and find them both very easy. However, I can’t see myself taking either to A-level/IB/whatever.

I don’t know if it’s better to get an extra GCSE (and a useful one, at that), or to skip all of that stress and coast through just taking History, Music, French, and Spanish.

I am predicted all 9’s and also worry about getting a 7 or 8 because of stretching myself too thin (I know this is irrational, but part of myself thinks that no GCSE in Geography is better then an 8 in Geography).

We would also save about £900 if I didn’t have to have the Music tutor and didn’t go on the Geography coursework residential.

I don’t know if I should go for the extra GCSE, or cut all of that stress and hassle and money (my parents’).

Other notes- I take grades on the cello, clarinet, and music theory, which show my qualifications in music.

I will be taking English language, English literature, Maths, Further Maths, Statistics, History, French, Spanish, Biology, Chemistry, and Physics, regardless of what I do about this Geography/Music thing.