Try to see some daylight in the first hour after you wake. A few minutes is a fine start.
Open the curtains right away. Step outside if you can. Take your first glass of water by a window.
Daylight is stronger than indoor light, even on a grey morning. Outside beats inside when the option is there.
Pair it with something you already do. Light while the coffee brews. Light on the step before you leave.
This is a timing habit, not a dose to measure. You are simply marking the start of the day with light.
Keep it brief and keep it early. The first hour is the part that does the work, so spend a little of it near a window or a door.