Welcome aboard, we're glad to have you!
The first step in the teaching process is finding other teachers. You're on the right track!
What I suggest is to go to www.mtna.org
and find out how to join your local music teachers association. Some states require a degree, but most do not. There you will find teachers of all types and abilities to help you. Get involved, but more importantly, find a mentor.
Observe as many teachers as possible while they are teaching. While I was studying pedagogy, we were required to observe ten lessons (at least 3 different teachers) each semester. This was one of the most valuable experiences I took from college!
Next, you'll want to evaluate your motives for teaching. Is it for the joy of music? Do you love piano? Are you proficient at playing? Do you enjoy children? If yes, good for you! You're on the right track. If your motives are easy $$$, you could do a disservice to your students and yourself.
Remember the important role of a piano teacher for good or bad. There are so many important factors to consider when teaching:
proper hand postion
method books - which is best for which student
what is age-appropriate
and many more........
You will want to do all you can to offer the best to your students. Find a mentor and do some research.