I need help. I google'd how to use the paint bucket in PSP because it doesn't seem to let me select it. It always fills up the whole canvas with my color or can't be selected it all. For instance I draw a circle with the pencil tool, the circle is still selected (adjustable) and paint bucket is grey, not selectable, as I pasted here:
What do I do to color in shapes and other drawings?
I want to color in all the parts of characters like this.

What do I do to color in shapes and other drawings?

I want to color in all the parts of characters like this.