Morse code is amazingly popular, nearly 20 years after the license requirement was expired for new hams. However, it remains probably the most efficient way of sending a message in terms of distance per watt. Jim, N4BFR, discusses how to start your Morse Code journey.
Learn CW Online site – https://lcwo.net/
ARRL Code Practice – http://www.arrl.org/code-transmissions
CW Ops – https://cwops.org/