YouTube University is fine for some stuff I guess, but the trades have been being trained with professional textbooks for about 100 years now.
If you go to ATP, McGraw-Hill, or Delmar-Cengage, you'll find hundreds of trade textbooks, the ones used by the Unions and Trade Schools.
If you are doing Carpentry, I recommend "Carpentry" by Leonard Koel, and maybe "Concrete Formwork" by the same guy.
If you do other trades, I could recommend books for those as well, but I don't want to overwhelm you.
Books on profit and markup are unnecessary and unfit for a first year apprentice. You need to learn the trade first.
Larry Haun is excellent, and an experienced carpenter can glean a lot of useful information from him. However, his method of building is outdated, as little that he built would meet current code. He was also very production oriented, which is fine, once you know the basics.
You can't get fast till you get good. :thumbsup:
There are even a few non-professional books that I highly recommend, like "Measuring, Marking, and Layout", which is a Taunton Press book. Jon Carroll, however, is a very accomplished builder.