Colocasia are easily propagated when natural offsets appear near the stem (base) of the plant. Once these are well established you can divide them and plant them in a new pot or location.

If you wish to pollinate the inflorescences that will likely appear in the spring you'll need to do a bit more research.

I'm attaching a paper by aroid expert Julius Boos which explains the basics.

Here is a link that might be useful: Natural and artificial pollination in aroids