Winlink
I have taken the GA ARES Basic and Intermediate Winlink Proficiency courses training.
Winlink software:
https://downloads.winlink.org/User%20Programs/
https://www.youtube.com/watch?v=T-ZvcJLwkbs
https://www.pcacs.org/wp-content/uploads/2021/07/20210721-ACS-Winlink-Training.pdf
https://www.winlink.org/sites/default/files/download/wl2k_faq_9.pdf
Winlink Wednesdays (Winlink training nets)
https://clatsopauxcomm.org/images/documents/technical/digital/VARA-for-Winlink-with-Signalink.pdf
https://www.vccomm.org/wp-content/uploads/2021/01/Quick-Setup-Guide-for-VARA-FM-4.x.x-2021Jan.pdf
https://gaares.org/wp-content/uploads/2023/08/NW-GA-WINLINK-GATEWAYS.ods
https://wavetalkers.com/pdf/Soundmodem_K6OLI.pdf
https://wavetalkers.com/pdf/VARA_FM_4.x_2021Nov.pdf
https://wavetalkers.com/pdf/Winlink_mesh-v1.2.pdf
https://themodernham.com/setup-pat-winlink-on-raspberry-pi-with-rigcontrol/
https://www.emcomm-training.org/Tutorials.html
http://km6zpo.com/winlink-workshops/