Daily practice. A few minutes of something completely new ( bc after a few times we're going to start learning it ). The piece should be well under our ability so as to make it easy to play as it is read. This daily focus will train your brain to look a head a bit like reading words but it takes much focused practice.
The only way I got better was doing it a lot. I’d find sheet music and a recording, and I’d just keep playing along, no matter the mistakes. Eventually the number of mistakes went down.