Very well done, OP! Lots of reflection, methodical approach, practical design. I’ve also gotten back to making physical things recently. I did not recognize the feeling at first, but soon realized I’m looking forward to getting back to building that shed. Have not felt that for a while about coding or other work. One advice I have is not to skimp on tools. I had some old wired tools that were OK. On a whim invested into a good Makita impact drill and it’s just another level. Got a circular saw as well and few other bits: having proper tools makes this so much more enjoyable. It doesn’t have to make financial sense, DIY is mostly about enjoyment. So why don’t I make sure I enjoy it?