Study online using https://hamstudy.org/
No HF radio setup at home? Stuck in a HOA that won't allow antennas?
Check out http://www.remotehams.com
It's free and easy to use thanks to your fellow Amateur Radio Operators sharing their own HF setups.
Not looking to transmit and you only want to listen in, then check out
http://kiwisdr.com/public/ also their map http://map.kiwisdr.com/