I apologize if this is in the wrong place as I'm new to this forum, but I'm looking for guidance as to setting up a flight plan in the FMS for the current MSFS version of the Cessna Citation. I've watched several hours of videos and read many pages of forums, manuals, etc. across different sites but I keep plummeting to the ground at record speeds after engaging the autopilot.
(I think) I understand the basics of navigating the various menus in the aircraft, I understand how to input/clear data, etc. and I can even get the autopilot to navigate laterally without any issues, but when I try to use VNAV things quickly start to go wrong. If anyone knows of an updated resource that offers a full guide on setting up a flight plan with working VNAV I would greatly appreciate it - I enjoy "flying" this aircraft, but my inability to use one of its most basic features has me feeling rather frustrated. I'm new to flight simming and aviation in general so I'm very much learning as I go and I'm sure I'm missing some amount of general aviation knowledge that would make this easier. If I can provide any more information on what I've done that would be useful, I would love to, but I'm not entirely sure what might be useful to someone trying to help and I don't want to clog up the post with a bunch of useless info.