If your brakes are constantly rubbing, just loosen the caliper bolts, hold down the lever and re-tighten the bolts. That solves 80% of issues. If it's a tick... tick.... tick sound, the majority of the time, the pads just need to recenter. This happens automatically on hydraulic brakes and the ticking will go away quickly. If the ticking doesn't go away, the rotor might be out of true, something you can fix with an adjustable wrench or even just your fingers and a paper towel. Most rotors come with a bit of runout.

A few things I've noticed:
Shimano post mount brakes are easiest to adjust and most tolerant of slight amounts of rotor runout.
SRAM calipers are a bit more finicky to setup but still not a problem. The tolerance and pad movement both seem to be a bit tighter.
Shimano flat mount calipers are very finicky to setup and tend to rub the most. This is a dumb standard, IMO, expecially given that the pre-existing post mounts work better. Still, you can get them working fine with some patience.

Also, roadies are far more sensitive to rotor noise than mountain bikers. Don't worry about it so much.