So, you are concerned that your life have a visible meaning because you want to be an example to others that leads them to living "more simply"

I would suggest you ask yourself two questions:
What does " more simply" mean to you?
and
why is it important to you that others choose this lifestyle? (or is it the lifestyle thats important? Do you want to see a change in society even if you have no part in that change? Is it the idea of being a good example/leader/mentor that appeals to you? Do you simply want external validation of your choices? From whom? Why?)

I don't know that either of those will help in your search for meaning, but they may provide you with some direction.