Never, ever, ever use the same grind size for everything. That’s like using the same wrench for every screw. You’ll strip something. Probably your patience.
Also, freshly ground is key. Pre-ground coffee is like a ghost of what could have been. The moment you grind, the aroma starts fleeing. It’s a race against time. Grind right before you brew, and your coffee will thank you.
And if you don’t have a grinder? Fine. Buy pre-ground for your specific method. But be warned: it’s like wearing socks with sandals. Functional, but not ideal.