おんがく

きょう、わたしはがたのしむおんがくこについてかくつもりだ。わたしはわろっくんろうる(better: ロックンロール)をおきくのがすき。、そしてわたしはわまた、おんがくを(or がっきを)おえんそうさいせいするのもがすき。わたしはわチェロをたさくすおえんそうする(or チェロをひく)。わたしのおきにいりのみゅうじしゃん(better: ミュージシャン)はVampire Weekend, Oasis, Arctic Monkeys, Phoenix, The Smiths. あなたはわどのようなおおんがくがすきですか？

*We use the particle は after the subject and it's pronounced わ, and after object, using を is needed, however, it's pronounced お. Also one more rule, you don't need to put any spaces between the Japanese words. 

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すきですか is correct but it't the formal form. Since you wrote in the informal/casual form so it doesn't fit in this note. 

Great job! please keep up. I hope this helps you.