This is by far the most universally helpful diagram I've found on the internet for getting started. For Nozzle height: adjusting filament flow gap. : r/3Dprinting
is this a good first layer? - Improve your 3D prints - UltiMaker Community of 3D Printing Experts
HowTo Stop the Nozzle from Ramming your Build Plate | IMADE3D
First layer, is my nozzle too close or too far? : r/ender3
3D Print Layer Separation - 3D Printing Blog | IIID MAX
Diagnosing First Layer Problems : r/FixMyPrint
How to Fine-Tune Z-Offset on a 3D Printer | ANYCUBIC 3D Printing – ANYCUBIC-US
HOW TO LEVEL YOUR 3D PRINTER BED – 3D PRINTING COOKIE CUTTER BASICS - The Sprinkle Factory
4.2. Nozzle Height Value – Tiertime Help Center
Prusa MK3S First Layer Calibration - Making It Up
How to Get a Perfect First Layer?
Nozzle too low? : r/3Dprinting
TAZ 6 nozzle too far away from print bed - Hardware - LulzBot
First Layer Calibration (i3) | Prusa Knowledge Base
HOW TO LEVEL YOUR 3D PRINTER BED – 3D PRINTING COOKIE CUTTER BASICS - The Sprinkle Factory
How to find the correct 3d printing temperature for a filament -
🔥 The definitive guide to solving 3D printing problems by Bitfab - Bitfab