1. Probably people will notice it. However, we don't need to do things thinking if they will notice it or not. Blecaute if you know your following your values, and doing it right, you ought just do it, if people notice ou not, doesn't matter, you should have your own merit.
2. If your not following values, you'll feel not fit in your mind, consequently, you'll be not walking you talk.
3. It won't be hard, it's pretty easy to be yourself, and that is what you'll be doing if you are following your values.