Have you a ham license NR? The Foundation chitty is easy peasy, more a quiz than a test with not a lot of tech content, more rules and regulations. Check for a local ham club and go for it.
The main limitations are in power output, only 10w allowed but on high frequency (short wave) with a good antenna, and good conditions you can work all over the world (better still if you learn and practice Morse Code)... these low power transmissions are known as QRP operating. I use one of these for mobile/camping
http://www.hamradio.co.uk/amateur-radio-...d-2459.php
https://www.youtube.com/watch?v=R8NMeSOc0Zc I use a wonder wand antenna antenna and several home made Dipoles, Windom being my favorite just now