Honest to god this isn’t a snark response, but Wikipedia is a great layman’s resource. Comment sections in Reddit and HN also come up with some fund factoids also, and sometimes link to legitimate resources.

And yes, it’s 2022 and I’m completely aware that I just recommended Wikipedia and two social media sites. I’ve taken the assumption that OP just wanted some general background, not a treatise on the dynamics of solar plasma and planetary magnetics.

I think it is a good advice, but if you want to get any deeper, it will quickly trickle down to advanced physics in kind of 'need to grasp lots of grounding physics knowledge at once to get it' form.

Oh, and we are currently having a geomagnetic G2/G1 storm.

Dr Tamitha Skov has some good videos: https://www.spaceweatherwoman.com/

There's also a lot of material in ham radio circles on magazines, web sites and books about this stuff because it directly impacts radio propagation.