Hi & welcome. Completely adorable! The little tree is amazing! Is it a Coleus?
If you can think of it, someone is probably selling it, online if not at a store near you.
If your pot does not have a drain hole, you might want to water with a squirt bottle on spray (not squirt/stream) setting, so you can moisten across the surface without risking adding so much water that it puddles at the bottom, more than the soil can absorb. That can make plants ill.
As plants grow, you'll probably trim some, move decorations around, maybe remove a plant or add new plants, kind of like in a full-size garden. :+)
