Sure! Keep in mind I print with a manufacturer (Stickerapp) so I don't know anything about printing from home - paper stock/lamination/print/cricut/etc... But here are some tips:

• 300 DPI ALWAYS. Keep your canvas large, you can always shrink designs to fit the dimensions you want but you can't enlarge them without loss of quality
• Checking CMYK colors before print is helpful. Clip Studio Paint can, and it's all I use it for. View -> Color Profile -> Preview Settings. I set "profile for preview" to Japan Color 2001 Coated, "rendering intent" to perceptual, and "library" to Microsoft. Then you can see what colors might need editing as well as tonal shift to get the result you want.
• In general, keep your colors light. That dark blue next to the black WILL look like the same color.
• Making very similar colors the same can make the design more cohesive, pop more, have a graphic feel and be easier to edit
• I keep one sticker of every design I make so I can reference its size, colors and finish for editing future reprints
• Storage is important.... I don't have enough storage for my stickers and prints, just one small desk shelf and a box full of my stickers in plastic bags. But I recommend getting lots of desk drawers if you can so your stickers don't curve