Where can I find Mac training?

Also see the Support articles and macOS User Guide here:

Mac - Official Apple Support

If you are close to a retail Apple Store, there may be some training sessions there. (When I spot-checked what was available at one location, all of the presentations were about the iPhone or iPad – with the possible exception of one about Apple Intelligence.)

Today at Apple - Apple

Training for what? As a Mac repair technician, or just basics in how to use a computer?

Manuals, Specs, and Downloads - Apple Support