First make sure you're printer installed correctly, during setup do not plug in USB devices into computers until the software asks you to.
Create a new report in design view, and choose a record source. (Do not add your Existing Fields) yet.
Next from the ribbon select Page Setup, in the properties select the page tab.
Select “Use Specific Printer”, find your printer in the drop down. The “Size” properties will change to reflect your printer.
Select the paper (labels) that closely fits your needs. Click on the print options tab of the page setup properties and delete each of the settings in the margins boxes and let them reset.
Look at the square notch of the upper left corner of your report, is there a green triangle? If so you need to move the work space a little to the left or up until the triangle disappears. If there is no green triangle you may be able to expand your work area slightly.
Now add your Existing Fields, usually set them small (9-10) font and don’t use fancy fonts here stick with the basics. Also you "can" delete the labels to the left of each textbox as they are created most of the time you do not have the space for them.
Labels are expensive so if you want to practice on plain paper set your page setup to default printer instead of “Use Specific Printer” or use print preview on your reports code to view on your screen. I hope this helps.
Richard