When I feel creatively stuck, I open https://calendaroftheday.com/ and see what the theme of the day is. It could be Color Day, Music Day, or even Simple Joys Day. I use this theme as a constraint or task for myself: to draw something based on the theme of the day or write a short text. This approach takes away the pressure to "create something great" and allows me to just get started. Very often, a small idea grows into something much bigger.