My husband has something in between, though with older CPU and GPU. He has 16GB memory with i7-6700HQ and GTX 1050. The fan comes on audibly at times, but heat dissipation is good and processing seldom or never gets throttled back.
Performance comparisons:
i7-6700HQ - 8129 Passmark
i5-9300H - 9774 Passmark
i7-9750H - 13660 Passmark
GTX 1050 - 5958 3D Mark
GTX 1660 Ti -11558 3D Mark
Yikes! That is way too much power for your tasks.
I have a similar model with only 8GB because I run Linux and GIMP doesn't need much memory even for very large photos. Darktable is mostly GPU bound.
We both love our Omen 17. Keyboard is especially wonderful. RJ45 Ethernet is advantageous for large downloads - WiFi isn't as fast as touted. I think HP stopped putting a DVD drive in there. We feel CD/DVD is indispensable, but you can always connect an external BluRay writer.