Calibrations are important, but the defaults should work reasonably OK out of the box. Don’t expect perfection from the start, aim for “good enough” and improve over time.

• Bed leveling (tramming) is mostly automated these days, since it’s such a vital step
• Extrusion multiplier (a.k.a. flow rate) needs to be done on a per filament basis, but it’ll probably work fine with defaults. Dialing this in is useful, but not super critical in the beginning.
• Pressure advance… eh, no comment, as I haven’t mastered this yet. Suffice to say my petg prints could be better, and this is the likely reason

Beyond that, filaments vary in quality. Try to stick to one brand and type that works well for you and your needs and once you’ve mastered that, try others.

And learn blender (or anything else that can export to .stl or other supported formats). It turns your printer into a proper household tool you wouldn’t be able to live without. My house has so many functional prints that I wouldn’t be able to go back to not being able to print whatever doodad I need.

EDIT: Things you should have:

• Filament dryer. Nothing fancy needed. I have one that can hold two spools at once, so that I can print from one spool while the next spool is drying.
• Calipers are vital for measuring things you want to print.
• Micrometer tool is excellent for dialing in flow rate perfectly.