I got back to playing about 10 years ago after a 35 year layoff. I keep it simple. The most important thing for me was making it easy to pick up the sax and play. Nothing fancy. I set up an area of the basement with my sax always on a stand so it stares at me until I pick it up (I now keep one in the case for gigging, and one on the stand for practicing so I can't use the "huge" effort to set it up as an excuse to keep me from playing). Started with (re)learning major/minor scales and major 7/minor 7, dom 7, dim chords (didn't really need a book for that), then slowly learned to play the real book 1,2 and 3 heads using the irealpro app on a cheap tablet plugged into a powered speaker for backing tracks. Then started improvising over irealpro tracks. Then after a few years actually took a few lessons to lay out some more efficient direction to my practice routine. Spent a bunch of time on bop scales and pentatonics. Then joined an adult "remedial" jazz ensemble where we play tunes and spend a lot of time discussing how to solo over them, and more importantly how to make the solo musically interesting. Now my routine is long tones, 15-30 minutes of technical stuff, and whatever time an energy left improvising over tunes that my group is working on, or tunes that I just want to learn better - focusing on my phrasing, theme development, timing and other refinements. I also have the real books on my tablet to take with me when I travel. I do have a huge pile of instructional books and they look really good on the shelf. Not sure I've ever spent more than a few minutes with them, but seems like there is nothing like buying another book to convince you that by studying it you will become the love child of Coltrane and Dexter.