Design your own personalized plates

I have a very small site that i sell license plate arts on and i would like to have a section for the customers to personalize their own text on the plates. I have 64 license plates and one font. The customer will pick their plate, color and then start typing their text. Once they are done they can click a button to send and pay for it using payal. Looking for something very simple nothing complicated and yet still looks professional enough. Looking forward to hearing from the pros! Regards.