shopify theme customization with editing liquid code and adding small features

I would like to make the following changes to the theme:

- change the product page layout which includes add to cart, quantity, size, placement of product name, size of text, back to previous page button at the bottom. For desktop view, I would like you to align the description of my product to the right instead of the left

- change my collection page layout to the same layout as the collection page. I would like 4 products on one line instead of 3. If there is more than one product image then I would like it to switch to the next one when the cursor is hovered over it. I would like all my products for that collection to be displayed together instead of having multiple pages for products.

- change my footer into the same footer layout - please use a suitable font to make it fit the aesthetic

- I would like you to remove sort by feature from all my collection pages on my website

- change side shopping cart into a shopping cart page

- I would like you to add currency selector in website navigation bar which changes currency