Try collaging for yourself!
I was first drawn to collage by its relatively low barrier to entry, and I've endeavored to lower that barrier even further here for you. Below is an interactive canvas powered by fabric.js where you, dear reader, can collage to your heart's content. Each element is independently repositional, resizeable, and rotational. Your only limits are my limited coding capability. May this inspire you, nonetheless.
If you like what you've made, take a screenshot! Refreshing the page will consign your collage to digital oblivion.