I started this habit by getting a kindle, putting it next to my bed, and promising myself that no matter how tired I am, I need to read at least one page before I go to sleep. Which is easy - it takes 1 minute. But it gets the ball rolling. I've finished 30+ books since I started doing this, and more importantly I'm reading every single day.

In general I recommend reading [Atomic Habits](https://jamesclear.com/atomic-habits) to learn how to pick up habits. Maybe that could be your first book.