I need to develop my prestashop site

I want to develop my presta shop website, I need it to become functional. It is'nt quite where I want it to be at so I need some one long term to keep an eye on it and update the site with the relevant modules for it to keep functioning. 1. I need the shipping modules to work correctly and be relevant to the countries it is destined for in the shipping preference in the back end 2. I need to install a news letter module and make sure it operating on a consistent level 3. Need the photos that are taken by us to be consistent with the other photos, perhaps help with photo shop and uploading 4. tweak on the pages via backend module/s 5. there are more things that we need to fix and to develop the website. All up for discussion. Thanks