I am newbie to all this and I learned that electrons can be wave as well as particles.

I don't have problem with the particle thing but how is it a wave? Isn't the wave just a path of energy travel. 

For example: waves in string is a path of energy travel. Then how can electron be somethings like this?

Am I misinterpreting the term wave? Or is there something else?

Are waves also made up of particles? Please explain in simple words.