I need an Ecommerce shop designing and building

I currently run a retro gaming shop on ebay however due to their policies and high fees i am wanting to move to my own E commerce store, it needs to be designed and built and want it to reflect what we sell, i need it to be very easy to add products and take them away as i am useless with computers. i will need payment options, product descriptions and photos, categories, contact page, shipping options etc, i will also need it fully optimised and very very visible on search engines and extremely easy to find, also ability to link social media pages and such like.