First layer test 100mm

I have been having good luck using this simple print at .2mm layer height to level the bed and set first layer height.

Roughly 100mm by 100mm in size seems to get my creality CR 10 s set well, In your slicer you can make it larger or smaller just keep the Z at your first layer height

I print it with a brim, the brim alone is all you need to print. Print, then check bed adhesion as you take it off, how well the extrusions stick together and you can check layer thickness with a pair of calipers.

the shape make it easy to know how the print was on the bed so you know which corner is high or low.

This works for me, let me know how it works for you