Anything is difficult if you don't enjoy it. I taught Soccer for 27 years, to players, coaches. olympic players. It was never difficult.
I taught Bowling for fifty years and is was a breeze and fun.
I have taught Chess to kids since 1970, adults and four of my children. It was never difficult. I ran tournaments and most at no pay. Because I love teaching chess.
If you think it will be difficult, it will be. If you can't laugh, teach with a smile you will fail. Don't ask those that don't teach and have fun it's a pleasure.
Make what you are going to teach FUN and CREATIVE. Prepare yourself. Don't teach over their heads. Sometime you can learn from the kids.
I recently was offered a job where I teach children in an after school elementary program. I would like to know if teaching chess for young children is actually fun for the instructor. I hear from other forums that this can be difficult work.