My son is 12, learned it over the past few months, as they had little to do for school. Started simple, with basically rendering some squished spheres and cubes

My son is 12, learned it over the past few months, as they had little to do for school. Started simple, with basically rendering some squished spheres and cubes, then followed a few YouTube video tutorials (desk with some random stuff on it). Next, he experimented with sculpting, but still has trouble with it. I was fascinated how he took an old photo of some ship, created the outline (extruded?) then added detail. Beats computer games :) Edit: one recommendation is to avoid books. YouTube and documentation are great.