Please help me find a suitable instrument!what instrument should I play?

I'm really love classical music and I thinking about getting some instrument.But it's hard for me to find a suitable instrument with me.I try to play with some instruments but it doesn't work.I can't play guitar because my arms is short;I can't play piano because it's too big (my house is too small):I can't play harmonica because my mouth is big and my lips is dried(it's easy scratch).So I want to play an instrument that not to expensive and not to big.I'm only 13 years old so please help me!Thank you