Wow! For a new guy you're awful pushy! JUST KIDDING!!!!!!!!!!!!!
Here again, others may differ, and that is fine, for me, for my .02, I use and like the stuff called " Fire Clean" there was a big hullaballew a couple of years ago, lawsuits and such saying that it was crisco. I didn't buy it then and I don't buy it now. For me, FireClean works superbly on my MP5 and other firearms. I've also used Hoppe's, Remington, Break Free, Slip 2000 is pretty good.
I just got tired of the smell, and having to use multiple products to achieve the end goal, a clean, lubed firearm. I get that with FireClean, and only have to use one product.
Again, others may and I'm sure will differ, that's fine, that is a big quality of hkpro, we can have differing opinions and thoughts, and that's not the end of the world.
Harbor Freight tools can be you friend for scrubbing type brushes and the required range boxes / bags. You might also do a search for "Swab-it's" they do real well cleaning the bore, and last longer than q-tips for some of their other brushes.
After you start to get comfortable with it, 500 + rounds, come to class. Best place going is Teufelshund Tactical, James is here on the forum Marine0303. You will not find better quality education when it comes to firearms and especially hk's anywhere, no BS. The guy is awesome.
Have fun! welcome!