>>368079652
There's no comprehensive udon guides but as the other anon said a lot of it can be done through knowing C# and normal Unity programming. Just be aware that Udon is SIGNIFICANTLY slower than normal C# scripting in Unity, somewhere between 10-100x is what I've heard. 
UdonSharp will give you warnings if you're trying to do something Udon doesn't support. The VRC website, but more importantly the UdonSharp Github wiki, have explanations of VRC specific APIs.

Unfortunately a lot of knowledge of how to do Udon well is fragmented. Your best bet is to ask around and see who has experience with doing what you're interested in. There were also a series of talks called TLX hosted by the VRCPrefabs lot, the most useful one being this one on syncing things in Udon https://www.youtube.com/watch?v=mNYt11OPXhI

>>368079956
>he has any expectations of the devs at all
there's your problem