Ideas for comic scripts can hide really anywhere. Don't be afraid to open your head and look for them even in the most unexpected places.
There are times when you have the time, you have the ability, yes, you even have the desire, and you don't have an idea. If such creative stagnation happens to you too, don't worry - it's completely normal. However, from my experience as a comic book scriptwriter, I'll give you some ideas on where to look for inspiration in moments of outflow of inspiration.