I had a pet project in the works, but then Unity did that pricing thing that made me lose my trust in them. But! then I got a job where I had to learn Unreal, so now I'm finally restarting the pet project in it. Admittedly bit of an overkill, since it's a dungeon crawler.
This is the humblest of possible beginnings: testing the custom editor functionality for a future 2D level editor.