Turn on the printer.

Run the self test in calibration settings.

If selftest ends with error, correct them before going further.

In Settings -> Temperature -> Fan speed set a value at 130 if you print lots of PETG and 255 if you print lots of PLA. For other materials, select according to your most used filament.

Run PID calibration in calibration settings.

Choose a temperature that matches your most used printing temperature.