Help with reading technical drawings

Hello! If there is a better subreddit suited for my question, please direct me that way!

Looking for help reading technical drawings, specifically HVAC systems. I have some basics down, but I am looking for more thorough answers. I am not finding them by the bit of google research I’ve done.

I’d love if anyone has any type of material they can point me to. Engineers are putting these drawings together, so surely there is some type of course material or information on all of this? Thanks so much!!

PS I am not a student, but if you think I would get answers over at r/engineeringstudents I might try there.

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