What are the required mod duties?
Pareidolia
Post pictures of things that look like something that it's not. Or sounds like something else. Or smells like something else. This subreddit is for things that unintentionally look like something else.
PAREIDOLIA IS NOT JUST FACES!
Basically, to be responsible for the community: adjust the community rules as needed, and remove inappropriate posts or comments. You can cange the community icon and banner if you like. You can also grant moderator status to other users.
This particular community seems pretty chill so there may not be much to do.
If you are feeling ambitious, you could also try to grow the community and make it a more active place. That can take a lot of work, though, so don't consider it a required duty.
Is it weird that because of the way the text of your post displays on my phone, that I can see a face in it?