What are best options for low cost self study version of these bootcamps? I'm basically retired at 44, live outside of a city, and have time and motivation but

What are best options for low cost self study version of these bootcamps? I'm basically retired at 44, live outside of a city, and have time and motivation but need serious instruction. I don't need the employment finding part of this - but really like the structured "real world" focused curriculum vs some of the more academic offerings I've seen online.