I Purchased a similar config, though i went with Asus Prime X570-P ($123 USD) just to get the X570 chipset in case i'll need PCIe 4.0 one day (my last personal rig lasted for 7 years!).
For cooling, get the super cheap Gammaxx 400 ($21 USD) more than enough as the 3600 won't overclock, but you'll get a good 15-20 Celsius better cooling than the stock AMD cooler (noisy at high speed!)
The RAM is the most important choice you have to make. I've tried a couple of sets and chose the Ballistix Sport LT 3200 ($75 USD)... i could push it to DDR4 3533 14-18-14-14 @1.45v with infinity Fabric @1766 and using fast settings with 1usmus Tool and his (complete and complex) overclocking guide... you'll find plenty of videos and guides on how to do that, but 1usmus Tool is a must!.... LinusTech says if you can push your infinity fabric to the max (1800+) a simple low latency Kit (CL14 or 15) of RAM works as good... no chance for me with my 3600, it couldn't go to 1800 but works @1766
Guide -> https://www.techpowerup.com/review/a...locking-guide/
Spending more on that config is nonsense in my opinion... no need for expensive RAM or Cooler, waste of money, save it for a good Graphics card and a good PSU (your choice looks good).
Warning: Apparently Asus BIOS doesn't work well with odd tCL timing... i could only work with tCL 14, 16, 18, 20, 22...all odd number were rounded up. The Corsair Vengeance LPX 3000 CL15 ($78 USD), highly recommended with the R 5 3600, did not do any good for me on that Asus mobo.
Finding the correct settings to overclock your RAM is a tedious process! Don't give up and try ALL the combinations from the 1usmus tool and play a little bit around them... it took me a good half a day to find the correct settings and pass all tests, and i'm 10% away of the optimum speed the tool is telling i could get from the Micron-E chips i got, but don't forget the chips you get are kind of a lottery, i just got a R5 not reaching infinity fabric @1800 (bad luck i guess) and the RAM did not go as far as suggested, but at that price, i got the best perf/$$ so far.
Hope it helps, good luck!