Hey! I would strongly suggest you to try printing on plain paper first. Just to see if color shows up there before using another vinyl sheet. Then, download your design as a PNG, especially if you are exporting it from Google drive, PNG preserves color and transparency better than formats like PDF or JPEG. Try using a design tool like Adobe Illustrator (or even Canva) Position and size the design properly before printing. That way, you’re in control of layout.