Hey Neida.
I am an expert in eCommerce and can make a great store for you to sell your hair extensions. More importantly it will have an admin panel which will let you easily handle products, list them, handle categories, stock, pricing etcetera without having to know anything about prograrmming or website design. If you want to take a look at my reviews you will notice that the last 3-4 have all been this type of store and how pleased the customers were with the final product.
I can also show you multiple designs of your store beforehand as well as showing you a demo of the admin panel you will use for the store so you will know exactly what you will be buying before you pay for it. If you are interested let me know.
Looking forward to hearing from you and good luck with your project!