first off you have to decide if you are going to be a business and find out the issues involved in that...and yes, even if you teach in a shop/school/business, and you take money are considered a "contracted" business!
if you teach in your home, contact your insurance agent and find out what the issues for liability will be.
you of course then also have to contact your city to find out the legalities of running a business in your home...
it gets really disheartening..trust me...
I found teaching at the local college in the continueing ed classes was best and easiest as they did all the advertising,etc...but you are still considered a contracted business and must file all necessary taxes!
a TRUE beginner quilting class should never take less than 6 weekly classes..I prefer 8, but that is a two month commitment..hard for most to do! and NO weekly class should ever last more than 2 hours...the beginner brain can't take it all in so more time is just more confusion/frustration usually!
Pm me, I have been teaching all of the above for years...