Here is a list of resources that go a bit more in-depth on fencing, or are good communities.
https://www.coachescompendium.org
https://nssv-donquichote.nl/en/221-2
https://www.reddit.com/r/Fencing
https://www.reddit.com/r/FoilFencing
https://www.youtube.com/channel/UCJEy8aBnqDymMIcJCh72gMw
https://www.youtube.com/usafencing
This is not by any means a comprehensive list, and their is a lot more great resources out their. This is a list to get you started.
Until next time,
-Fuzzy