Changes

Additionally, keeping your audience in mind, the difficulty of material and assignments should be within the grasp of the group. Don't attempt to teach 5th graders multivariable calculus and don't attempt to teach engineering grad students about buoyancy with tin foil boats. They may have fun, but the goal is for people to learn something new.

It would be better if you choose a peaceful room, you may actually ask the school/ college management members to arrange a room for you, but if that isn't possible it is better that you rent a room of low cost to conduct the class so that it doesn't become a burden on you.