Don’t waste your time or energy trying to be impressive. If someone is going to be impressed by you, they’re going to be impressed whether you’re trying or not. If someone is not going to be impressed by you, they’re not going to be impressed whether you’re trying or not.
So just be your own best. Do it for yourself, and know that the right people will notice what you are doing. Most people won’t notice anything, but that’s just what people do. It has nothing to do with you.