OK, rooted around a bit for you. The volunteer groups (storm clean up, trail maintenance, etc.) might want some type of verbal commitment to assist in exchange, but that could be a good hobby or rewarding service to participate in anyway.
Some commercial training organizations are listed below, but might require some travel, and an enrollment fee. Requires some commitment as well.
Only so much that one can cover in 4 hours (or 8, or 16, . . .). Personally, I am always interested in attending any training I can. If it is a basic intro provided by a local dealer, trail certification by the USFS, etc. One year I found that my county does a refresher course every year, and that year 'they had a few extra seats available' that they let us fill.
Remember that basic 'chainsaw operation' is separate from 'falling trees'!
Started with a basic Google search and added a few orgs that I know of. More resources at the end of the last reference.
View attachment 729243
http://www.gameoflogging.com/training.php
https://www.tcia.org/ (*Chain Saw Specialist course)
http://www.arbormaster.com/services/training
https://www.arboristsite.com/community/threads/chainsaw-safety-falling-safety-videos.328349/
Philbert