Add products to spreadsheet and save a product image

I need help adding products to out website. I need a simple spreadsheet completing with the required fields which are: Product Name Title Category Small, Medium, Large price. Small, Medium, Large size. I also included a number of vector designs which I need each one putting on a blank room image and saving. this process needs to be completed manually for 75 products. If you are successful this will be regular work for the right person or team. I have included a detailed brief attached to this project. Basically it's an easy job once there is a good understanding of what is required which is why I have included a detailed brief.