There is also an excellent 787 guide on this forum under Manuals. Look for that. Sim-market sells a manual Published by SoFly. It’s very good, called " A guide to Microsoft Flight Simulator" around 15 dollars US depending on exchange rate. Currently 1.70V is the latest release. But, as mentioned, YouTube is your friend. My suggestion is get a program which will allow you to copy those videos to your PC, so you can watch and then do the thing said in the video. The Quality Wings 787 Video is over an hour long and is excellent for learning the 787 from cold and dark. MSFS is not nearly detailed enough to make all those systems work, but many of them do. Have fun.