I am 37 and have a background in engineering/drafting. I’m proficient with most design software one would use for DIY projects, but my favorite is a good ol’ graph paper notebook, mechanical pencil, and small quilting ruler. I’m very tactile and just enjoy putting a pen/pencil to paper, plus it’s way easier to make quick tweaks with an eraser than it is to fire up the laptop, wait for Windows to update (because it always fucking does), make the changes, print a new copy to work from, etc, etc.