This site is not for children. Are you over 18?
CTRL+PEW has put together a great comprehensive guide to printer calibration and getting started with 3D2A. Its worth a read, and following along their lessons.
The Getting Started Guide
Two very comprehensive guides to getting your printer calibration perfectly dialed in:
https://ellis3dp.com/Print-Tuning-Guide/
https://teachingtechyt.github.io/calibration.html
You can also search on Odysee for pre-made printer calibrations. https://odysee.com/@Print-a-22:a/Print-Profiles:8
Tuning for Dimensional Accuracy: The Califlower With Calculator