Move Products List

Hello, currently, on the store page of my website, all product categories are listed at the top. I'm wanting to relocate them to the left side of the page. Additionally, it would be ideal if the categories remained fixed in place while scrolling down through the products. This way, users can easily access different categories at any point.

- Also is there a way to have my product images be square instead of portrait? They show up as square in the store gallery but once you open that product it zooms into a portrait and i upload all my images are squares so it cuts off the side of the images..

Hopefully someone can help me achieve this, I thought it would have been a simple task but I'm being proven wrong. 

Thank you.