Honestly if you're interested in this stuff I'd encourage you to get a radio license. You'd probably be interested in repeaters, satellites, and HF, but you might also be really interested in stuff like APRS (which is sort of a giant radio mesh net). I don't know what country you're in, but usually licenses are really cheap and just require you to pass a relatively easy (with some studying) multiple choice exam. The hardest part is usually just figuring out where you can take a test (at least in the USA tests are run by volunteers, so you have to do a little bit of searching to see when they do them in your area).
Honestly if you're interested in this stuff I'd encourage you to get a radio license. You'd probably be interested in repeaters, satellites, and HF, but you might also be really interested in stuff like APRS (which is sort of a giant radio mesh net). I don't know what country you're in, but usually licenses are really cheap and just require you to pass a relatively easy (with some studying) multiple choice exam. The hardest part is usually just figuring out where you can take a test (at least in the USA tests are run by volunteers, so you have to do a little bit of searching to see when they do them in your area).