[HECnet] DECNet for Dummies?

Greetings all! I have been a lurker in this group for years but have never started a HECNet implementation of my own. My experience with DEC machines is only through Simh and I would like to expand my horizons with probably the MicroVAX 3900 simulator. There are a few of challenges with this. 1. My knowledge of DCL is quite rudimentary. 2. My networking experience is strictly TCP/IP. 3. I have seen how much enjoyment you all have with this but I am still not sure what to do with HECNet. Nevertheless, I would love to get involved but I will probably need some hand holding and it would be understandable that no one has time to help me. So I was wondering if there was any beginners guide to DECNet I could read or if anyone would be interested in helping a total beginner. I have 3 computers all running Linux: an older desktop, a laptop which I usually use on wifi so that probably isn't a good choice and a Raspberry Pi 4. Again any help and/or advice would be much appreciated. Thanks Ray