Music is the expression of an emotion, where an instrument is used to convey an idea in the form of a beautiful sound.
There are many different instruments, some of which are widely used all over the world like the guitar and the piano. There are those that and rare and specific to their own region. Learning music need not be instrument specific because an instrument is but a medium to express a musical idea. Some prefer a piano or a digital keyboard, and yet others prefer a trumpet or a violin. One's voice can also be considered an instrument.
Irrespective of which instrument you choose to learn, the music remains the same and so does the learning. What changes is the technique used to play each instrument. If you are a beginner and you have tried to play but have failed miserably, don’t blame yourself. It has nothing to do with your lack of talent or capability. Following random videos and books will not take you anywhere but to confusion. What you need is proper guidance. Once you have decided to learn to play an instrument, be committed and practice daily.
Most students prefer to learn the guitar as it is the most common and handy instrument. Go ahead, pick up an instrument today and express your thoughts and emotions in a language that can be understood by one and all.