Once you start learning you should share what you have learned. Even if you think it is easy I guarantee you that someone else does not.
You will learn a lot by teaching someone else. You know more than you think. If you can't answer their question then just google it together or ask someone with more experience. Either way, it's a great way to find out what you really know, enforce it in your memory and to have fun with a new friend.
Words to avoid when teaching:
Check out this video that Machiko recommends.
Take a Break
Don't forget to give your students a break or they may fall over.