Sorry for the late reply...
Remote Viewed is Daz Smith's site.
Unfortunately the link above is generic and not annotated in any way. However, if you instead go to the Remote Viewing Discord group, there's also a pile of books listed there.
I'm slowly going through a pile of these books myself, so if you want, I can update you on them. My current read is Daz Smith's book on CRV - which is merely a book version of the 1985 manuals done by Ingo Swann's students (mostly, apparently, Dr Paul Smith and his students). It's done from memory!! It's also not copyrighted, because it's a government document (and they can copyright, they can only classify - and it's not classified!)
Next on my list is Daz's flow manual. and then (and already lined up) is Joe McMoneagle's Remote Viewing Secrets: a Handbook. After that might be Lyn Buchanan's book... or Courtney's (if I can get a hold of it).
After reading through this first book, I am surprised by the number of online courses, given the amount of time and effort that went into training those in the Stargate project! It appears to be a 5-7 day week of daily training of exercises... for months on end! Not a simple one weekend thing.
Speaking of which - yes, there are a few online courses out there. Many are free (e.g., here at FS with Courtney, Intysam and Jenee each having their own), but others are paid for (eg, those on Udemy (but only about $15). Lyn Buchanan is charging about $1500 for his online course.