Wall bracket / wall retainer / holder

I built this as a retainer for when I stow away my pizza board, which I use to prepare my pizzas. The board leans against a kitchen cupboard and I built this retainer so it doesn't fall over. This is my very first own project, been 3D printing for three weeks and thought it was time to create. I know this isn't much, but I am so proud as it's my first ever model that I built. I used Bambu Studio Modifiers to increase wall strength and infill around the holes, this should be rather solid. There are also two small caps to cover the holes for the screws, they hold by friction. I built this with Tinkercad, which probably says a lot about my level of sophistication. :-) I'd be incredibly happy if someone finds this useful.