gcse music

so i’ve picked music as one of my gcses but my friends mum (who was a music teacher ) thinks i should do the exam in year 10 (i’m in year 9 rn) i’m grade 6 violin and grade 3/4 piano and done my grade 5 theory but i’ve never done any composing- does it take a long time to get the hang of in which case i’ll take it in year 11 but if not i’d rather get it out of the way sooner rather than later. i’m just not sure if i can get the best grade possible if i do it a year early

I think if you give yourself more time for the composing you are likely to do better, as well as improving in performing and theory, so I would probably say do it in year 11, so you can really figure out what makes a good composition. Hope this helps

could you start composing now to take the exam in year 10?