We learn chords,songs,melodies,and share them with others-but what about sharing the journey that got us to that spot to begin with? Teaching. The very word tends to make us want to run into a closet or go into a speech about how we don't really "know enough" to teach someone else. Belittling inner chatter kicks in about how ridiculous the notion is. Yet-if you've been playing for a year or more,I'd say you could teach a beginning class without a problem.
Next choice is what age group do you work best with? Kids? Teens? Adults? Seniors? Picking the group you work easiest with is very important-because you don't want to get home from teaching being worn out and drained. Personally speaking,I work best with teens to jr college age kids,as well as senors.
You can select a beginners book for your teaching material and have include it in the student fee for the class- or you can also out together your own chord charts,song sheets,etc.
Make sure your students have their own electronic tuners or the entire time will be spent tuning. Also be sure to start promptly and end on time as well.