Customize shopify theme

Hi, I'm looking for someone to hire for a couple task I'd like to see completed. I'd like to have different type of "collection" and I can't seem to do it by myself. When I click on Collection I'd like to see a thumbnail with the different collection like "Winter, Spring, Valentine, etc" and when I click product, I'd like to see the "pants, headband,etc" collections, right now everything is under collection/all without possibility to differentiate between a product type of collection and a collection type of collection. The theme allow to have a preview of products and collection in a drop down menu but I think I broke it and would like it to be fixed. Also I'd need help in changing some pagination stuff. - Moving the view cart button and the color of it on a product page once there is something in it - adjusting the left/right margin of my instagram bar on my homepage - adding a contact us form in the Retail Location to allow people to request how to become a retail store - changing the dark shopify instagram to the more colorful links - and maybe other design stuff will come as we go. When and how much would you charge for some of it and maybe some by the hour after these are completed ? Thanks