What's the difference between "Hard" and "Difficult"? and tell me an example, please. Thanks !

First notebook entry: Introducing myself I have to write about me again? Ok... Hello everybody. I'm Cristian from the beautiful Colombia. I'm still learning english, and I come to this website by chance. My english is still very bad, but I'd want you to help me with that. By the way,if you need help with your Spanish, then tell me. See you.