This was my first piece that required any joinery; counting the one-piece iPad shim, it was my second piece.
I needed shelves with a custom size for the mudroom, and studied another set of shelves to see how they were built.
Every bit of this was new to me, and challenging — lumber selection, glue selection, finishing. I had to buy a decent saw for the first time in my life (I hadn’t realized that every saw I’d used up until then was substandard), and researched and then bought my first hand plane.