If you’re new to 3d printing (FDM in this case) there’s a few common things that will help your prints. First bed adhesion is key. Spend the extra time and make sure your bed is level and dial in the Z height. Plus avoid drafty rooms and think about a simple enclosure for your machine. Keeping your printed part at a uniformed temperature will save many medium or large prints.
Second, look at your extrusion settings in your slicing software. By default, most package will tell you to print at 100%. Which in my experience leads to over extruding plastic out of your printers hotend. Which leads to a loss of detail. My machines are set to 92 to 94% extrusion.
For printing my models, I generally set my layer height to 0.2mm with a perimeter of 3. While the infill is set to 15 to 20%.