Emm, you doing all right. To look more serious and professional I would recommend, to have a better quality pics of your product (especially the main on a background) that's kinda important, because it's a first thing you will see on your store, and must be a great visual look. Then, a fonts...You gotta work on it, it looks a bit basic (check this out https://www.fonts.ninja/ here is a tool to help find and combine fonts for description and headlines and so.) 3rd thing if I were you would improve is a feedbacks, now it look very robotic and boring. People want to see an actual footage of your product like unpacking photos, holding in hands, like more alive, as well visualization (stars that client gives to your product) there are really good tools that you can directly from supplier transfer a feedbacks to your store. Hope you will find anything helpful in my quick review. Good luck!