A 20$ RTL-SDR will give you a very broad view of the spectrum and an idea of how one area can be quiet, the other filled with signals and the oddities of atmospheric noise, etc. Super fun and there are 100,000 YouTube videos on how to get it working.
I would argue that a $0 web-sdr bookmark will teach you exactly the same things without you forever wondering if it's your antennae that's the problem.