How much coffee quantity do you guys use?

Hi there! I’ve been using a manual burr coffee grinder and a French press, and I’ve been exploring the coffee world for about 4-5 months. So far, I’ve tried Lavazza Gusto Crema and Devans Viennese Blend, and I stick to making cappuccinos. I gave black coffee a shot, but it was far too bitter for me. Here’s what’s puzzling me: everyone talks about noticing distinct flavors when trying different coffees, but honestly, I don’t pick up on much difference in taste between Devans and Lavazza—it all seems pretty similar to me. Am I missing something in my process? Also, how much coffee do you all typically use for a single cappuccino? My quantity is as follows : 7 grams coffee, 100 ml milk, 100 ml water.