At the amateur level few home shops would really need complex strength, fatigue resistance, tensile, young's modulus, engineering data etc unless your planning on something fairly unusual for a home shop. But who knows. If you really do need that, then it's going to be awhile just learning enough before it's ever going to be required. I still don't and never will do automotive brake or steering components even for myself since I'm not and never will be at the required mechanical engineering level to do so properly.
http://www.opensourcemachinetools.org/archive-manuals/Hercus_TextBook_of_Turning.pdf That PDF seems to be rarely mentioned probably because few know of it. But it's what the South Bend How to run a Lathe or the Atlas books should have been but aren't.
https://pearl-hifi.com/06_Lit_Archi...s/Schlesinger_Georg/Testing_Machine_Tools.pdf Maybe some would view this PDF as unnecessary at the home shop level, but in my view the basic understanding of the fairly complex machine tool requirements for accurate machining and checking or adjusting for alignment is extremely helpful and something I very much wish I knew about when I first started. For myself it was a massive step up in what I was really trying to learn about.
While machinist type forums and Youtube are a great resources, neither for obvious reasons can properly get into the more technical details good reference books can for those much more specific areas. There's been quite a bit of North American written information meant for more amateur levels, but it still doesn't come close to what's been written in the UK.
https://www.teepublishing.co.uk/books/in-your-workshop/
Thinking you can just use these forums and YT without spending a dime to help educate yourself literally slows your learning rate that's still going to take multiple years even with that reference information to actually get any good and repeatable at it. Machining is nothing like teaching yourself to be a fairly good woodwacker. It's vastly more involved. That's also why even a basic machinist apprenticeship in most country's is at least 4 years and the theory being taught in formal school settings as well as mandatory on the job training during those same 4 years. And at the end of even all that your still classed as an entry level machinist who's then going to spend the rest of there career learning even more.
All of my reference information I've been collecting for the last 40+ years are tools and imo are just as important as anything else in my shop that cuts metal. These forums and YT can help fill in some details that might be not quite clear enough in those reference sources, but there not and never will be a replacement for that hard copy information. You also have to learn enough on your own just to properly judge and pay close attention to Guythatbrews 100% true warning about all the probably well meant but still "idjuts" out there.