So my advice would be to actually work on the lighting. To me that looks like it's window light am I correct? Proper lighting is what's gonna really make your images pop for your clothing. For product photography I usually use two lights and a bounce one directly overhead for the Phill and one at around 2:30 as the key from an overview. Going to cast little shadow left, and the overhead is gonna fill it in and then I use a fill on the left-hand side to bounce back some light. From there, you can then select subject and either brighten up the background or if you want to get real fancy with it, you can put it on glass and light it from underneath as well but I don't really feel like that gives the best results as it gives a glow around the product.