Is learning a piano harder than a violin?

Hi

I'm very interested in starting to learn music. Do you think learning piano is harder than playing the violin?

My favorite singer named pedram paliz taghvim shamsi started playing music when I was 4 years old. I could not learn music at that age, but now that I have the opportunity, I am very interested in learning music. Do you think learning piano and dulcimer is harder than playing the violin?