Now that you have chosen your program you need to gather text or graphics to put onto your book cover. I recommend that you head over to google, bing, yahoo or whichever browser you use and search up images that are related to your story. For example if you are writing about romance you can search up stories of couples or whatever else is related to your story. Another example is if you write about dogs you can write put graphics related to dogs. Choose your images wisely.
1. Make sure they are large images. The book cover size on Wattpad is 256 x 400 make sure you use that while making your book cover.
2. Make sure your graphics aren't blurry and of high quality. If your graphics are blurry it won't make your cover look nice.
3. Make sure your graphics are related to your story. If they are not they will give readers the wrong message.
Once you've chosen your graphics start arranging them to build your cover.