- I guess the official release will be once UE 5.3 officially comes out?
Yes, Learning Agents is an engine plugin that will be coming out with 5.3
- Although how is the stability and completeness of the plugin in right now UE 5.3 GitHub version? I’m tempted to build UE from scratch just for this plugin.
Learning Agents itself is stable but the rest of UE may be unstable. 5.3 has recently branched from ue5-main so you may have more stability on that branch: https://github.com/EpicGames/UnrealEngine/tree/5.3/Engine/Plugins/Experimental/LearningAgents
- Is there any community or discord around Learning Agents? It might be an interesting place to share information and tutorials.
There is no official community outside these Forums at the time. These dev forums have somewhat recently added a “Learning-Agents” tag. You can search for new topics with that tag and even setup notification settings in your profile. I have notifications setup myself so I should be able to see and respond to any new topics related to Learning Agents 
Is there any ETA on when the learning course and examples might come?
The best I can offer is that they will be posted at the latest when 5.3 is released. If we get them done early, we can probably post them sooner but I can’t make any promises.
Thanks for the questions,
Brendan