You'll want to make sure the bed is level and the extruded is the right height from the build surface also, that has a lot to do with the adhesion of the first layer. What slicer software do you use?
I am using Cura slicing software. I did level the bed, then promptly jacked it up by hitting a bed offset button on accident. Then set bed level again. It would not release the motors so I had to home it then turn off to adjust. Seemed to work but maybe not quite right yet. I'll have to watch some more youtube videos.
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