As stated at other places in the forum I will not find one bit of help with millis timing in any of these text books
That's because the textbooks are teaching C or C++, where the vast majority of applications of the languages are in, well, applications and not in embedded or systems programming where the use of timing is much more common.
A better source of information on timing would be in textbooks on real-time or embedded systems, but these are usually a little too specific about a particular RTOS or too academic.
Sometimes answering noob questions is a fine art and a balancing act - the "posts counter" might be low, but the person may display a reasonable amount of prior knowledge.
Writing the code for them could be insulting, so I try to point them in the right direction, then answer questions when they've done a little more research.
I'm happy to take as long as it needs to guide people who are willing to learn and even take a few stumbles, but detest those who just demand specific answers to their questions and can't be bothered to pick up even the most basic fundamentals and so keep asking the same questions and making the same mistakes, or want code writing for them.