If you are starting a business for the first time there's a wealth of support and information available including online groups. If you plan to sell on Etsy, you will find many tutorials available to get you started. You'll also find a wide selection of books published on the subject of running a successful handmade business. When looking at books, make sure you find books that are up to date. The market for selling handmade cards and other products is constantly changing. Another great option is online training and workshops.
Before starting a handmade card business that uses artwork from another designer, be it in a stamp form or ready printed, check whether this artwork comes with a commercial use license or if you have to pay for the licensed image (once or every time it's used)? If you do have to pay for the image, make sure that cost gets factored into your pricing formula as you determine the per-unit cost of your cards.
Because Apple includes applications for photo editing and creative projects in its macOS, we found most of the Mac greeting card design programs we tested have fewer editing tools than their PC-compatible counterparts. This means you may need to edit photos in another application before you upload them to your greeting card software. A few of the programs we tested have some basic editing tools, such as those for cropping and fixing red-eye, but those same programs have lower quality graphics.
I used this product with the Avery template 5388 from the Avery website and using Microsoft Word to print 3 x 5 cards and it worked great. The sheets are sturdy enough to take two passes through my Brother laser printer, printing first on one side and then manually turning the sheet over to print on the other side. After printing, the cards are easily removed from the sheet and have very smooth borders which look quite professional.
The presentation of the cards—the packaging—helps make a successful handmade card business. A card that is neatly presented in a cellophane envelope looks more professional and can command a higher price than one that is unpackaged. Presenting cards in some form of packaging stops cards from becoming dirty or dog-eared and it also gives the ideal opportunity for further marketing. A label on the back with your phone number or website address could help you solicit further orders. Remember to consider shipping and packaging when factoring the costs per unit in your pricing formula.