If you look at a ladder. Some people it's a lot of effort to reach the first rung and that is their only goal and that is their happy place. Someone else may aim for the top rung. But there is no judgement, there is a place for everyone at whatever level they want to be. Maybe simplicity to someone is learning to declutter and be happy with less, maybe throw in some budgeting skills and goals. Maybe to someone else it's learning to only throw away one small bag of trash in an entire year, make their own deodorant (or go without), only have 12 items of clothing, etc. Having a non-judgemental overview type class would be more friendly to a larger audience. Your hard-core group is going to be smaller. I think the biggest advice is to not toss around judgements about what level others "should" be at.