Forget realistic. What is it you long for? Who is your best self, what are they like, and what are they doing, thinking, and feeling?
Then figure out the smallest simplest thing you can do today that moves you towards that purpose. Do that thing. Then figure out what the next smallest thing is, and do that next, or tomorrow. Keep at it. With momentum building, soon you'll be able to do more than one small simple thing at a time.