I practice...で始まる文の所ですが、下記のような感じで掲載して頂いても宜しいでしょうか。
We have two or three practices of the drum, the flute and a pair of gongs a month. Of course it is for the performance in the Nebuta Festival we love. If you are interested in playing that Japanese instruments, we always welcome you join us, let's practice them together in order to be a great player of our Festival, and in Tokyo, why don't you make your debut in the real Nebuta Festival with us?