I was talking with some people today at the Hurricane Expo about Meshtastic.  There are 2 groups on Discord about Meshtastic that are very active.  One of them is the official Meshtastic group which includes the developers and the other one is the Comms Channel discord.

   If you are not familiar with Discord, it is a chat based application that is organized by topics called channels.  Discord is free and can be installed on any operating system or mobile device.  You can download it by going to Discord.com.

   One you install it, you can use the following links to join the discord servers:

https://discord.com/invite/ktMAKGBnBs - This is the official Meshtastic Discord.

https://discord.gg/xyVPFHHk - This is the Comms Channel discord.  They talk about more advanced parts of meshtastic like Solar Nodes, 3D printed cases, etc.

Both of these are very active and a good resource if you have questions.