I propose to join forces and fill a list of useful (online) resources. I start.

Courses (free, online)

• CW Academy https://cwops.org/cw-academy/
• CW Innovation https://cwinnovations.net/

Websites to learn and practice

• Learning CW online https://lcwo.net/
• Morse Code World https://morsecode.world/
• VBAND https://hamradio.solutions/vband/
• Vail https://vail.woozle.org/