This Video shows the 3 most critical slicer settings to get good bed adhesion on a 3D print.
I use Cura by Ultimaker for all my 3D printing, its powerful and free, to learn more check out: https://ultimaker.com/software/ultimaker-cura/
First start by unlocking the settings for each item by doing the following

Initial cooling settings, adjust as needed:

Flow settings:

Speed:

PEI Printbed = https://www.amazon.com/gp/product/B08…
SUNLU PLA = https://www.amazon.com/Filament-SUNLU…
Ender 3 Neo Max = https://www.amazon.com/Creality-Max-N…
