- Learning an instrument is not as easy as one would wish.
What is the use of "would" here and what is the meaning of these sentence?
The sentence means that we would like it if it was easier to learn how to play a musical instrument. Would is a modal verb used to express hopes, desires and so on; "I would like it if learning an instrument was easy."
"One" in this sentence is a pronoun referring to people in general, or perhaps the speaker in particular.