Yup last commenter is very astute in theyre observation. After you get z height right you can try to calibrate your esteps to try and get your flow as close as possible to accurate. Also attention to things like the thickness of filament entered into slicer software and/or machine settings can help too if your not putting enough (or too little) material out at the correct height it cause problems with first layers. I hope I’m not being to vague with my descriptions but I just trying to add to the community