I couldn't find a full bed sheet test premade for the Ankermake M5. This one is 230x230x0.2mm the full bed is 235x235. If you want, you can resize them to 235 by using scale in the slicer, just turn off uniform scaling.
The settings in the 3mf will work for Ankermake slicer and prusaslicer. Should take about 44min.
I auto level my M5.
I use a bright filament for contrast on the bed.
Then start this print and adjust the Z from there making marks with a sharpie at each level change.
To get get an idea of what too high and too low of a Z looks like I use the link below to compare.
https://www.tomshardware.com/how-to/correctly-set-3d-printer-z-offset
The author marked this model as their own original creation.