how do you find images for moodboards?
i use a mixture of Google and Pintrest (primarily pintrest)
Basically, I get the vibe I want to go for, for example the Mello moodboard i did was about religion, and he's very commonly headcannoned to be catholic. So I searched things like 'religion' 'catholic' and added aesthetic afterward (not saying religion is an aesthetic it just helps to find nice pictures). If you want certain colors or details in it, then add that to the search bar too. Also, something I find that helps if that if you click on an image that fits with the vibe you're going for but doesn't actually work with what you have, underneath or to the side they'll be similar images and you can just keep going until you find one that works.
I hope this helps!