You managed to get a pretty good plant growing there... not bad for a first timer. First thought was wondering if you had been misting that plant or something. I see the WPM spots people are talking about but from resolution I can't tell if thrip damage or the dreaded white fuzz. Folks are gonna cringe at this but if it could be thrips or it could be WPM and you're not sure, hit it with some Neem and you're good. Just don't drench the buds in it because there's a lot of folks who assert it will affect taste and smell of final product. There's times I had to whip it out against unrelenting mites and I haven't noticed anything negative before.
Some other things... Plant looks overfed and not under based on the browning edges. And something else, I see them brown spots and from the pics I can't tell if that could be the onset of calcium deficiency from a nosediving pH environment or, suce there's also potentially WPM going on, if you might also have some leaf septoria setting in.
So course of action, you want to hit your plant good with an anti-fungal and also check the pH at the bottom to make sure it's not sitting below 5.8 and blocking cal/mag uptake. If you have an EC pen it might also be worth a look to make sure it's staying below 3. If necessary, you can bring both those numbers down with a little extra tap water through the pot but it doesn't take a ton and should be done in small increments as you watch the numbers so you're not stripping the good stuff out with the bad.
