Ender 3 Nozzle does not clear bed
There are several ways to get the Z0 into a position the sotware can account for it without needing to write your own firmware if needed:


Remove the build-tak-clone under your glass sheet to get the better heat transfer and remove a couple millimeters.
Tighten the bed leveling to account for some millimeters.
Move the physical endstop to account for the thicker build platform.