Adjustments to Shopify.com Website

I have built an online store using shopify.com. Please will only individuals who have extensive experience with [login to view URL] contact me. The website is complete except for a few final touches: 1. Add in social media icons at the top of the homepage - I also want the capability of changing the social media site to which the icons are linked. 2. It is built into shopify that the Right Column shows the various brands of products sold on your website if you choose to display them in addition to product types. The brands are displayed below the product types. The brands displayed are in writing. I want to replace the written brand names with pictures of the brands. I also want the capability of being able to choose the collections that each brand is linked to and I want to be able to add more or less brands to the right column at will. The space available for each picture must also be a standard size which is the same width of the right hand column. 3. I also want to add an image on the right hand side of the homepage above the navigation bar and want to be able to change the image displayed and the page that the image links to. 4. The welcome widget is displayed in the right column. Standard you only have the ability to change the writing displayed. I want the option of having an image displayed in the same space as the welcome widget and be able to change the image displayed.