Worked in the software industry over 30 years, now retired and playing in three bands in the New England area hillbilly, klezmer, and eclectec acoustic..
I play guitar (mostly a Peavey Tele clone) and upright bass. These songs are ones I've written over the past ten years. Too much time on one's hands will produce that kind of thing.
For the most part, they're recorded as two tracks (one vocal, one guitar) on a dinky Fostex digital recorder, then merged to a single mono track because it's easier to deal with. Some have extra tracks for harmony vocal and a couple have rhythm guitar and bass tracks as well.
I'm a thumbpicker and use Fred Kelly thumbpicks and bare fingers.