The one upstairs. Yes But flute needs vital capacity and is very tired. If you are thin, I don't recommend you to learn. If you are slightly fat, you are full of energy and makes sense. Among the instruments you mentioned, dulcimer is the easiest to learn. It belongs to percussion, so it doesn't need to be changed. The sound is all on the string, very dead. Personally, I don't like its sound very much. Guzheng is a pentatonic scale, which sounds good to talk nonsense. If you don't believe me, you can pull it twice with one finger, which is nice and easy to learn. Pipa is more difficult than the above instruments. Let's see what you like. The key is interest.