Pound for pound, guitar is the easiest instrument to learn. Here's why:

1. 7 basic chords can offer you millions of songs alone.
2. Strumming is easy to do when you have the right skills (and those don't take too long to learn)
3. Strumming and changing chords can be difficult at first, but later become like second nature.

Though guitar can seem like a steep learning curve, it's not as bad as violin, clarinet, or piano. Plus, you get to play loud and enjoy playing along to your favorite tunes.