Modifications to Magento 2 Store

We purchased template monster theme 62101 for our Magento 2 store. Currently, the layout is stretched too far across the screen. We would like to have it reverted back to the original demo size. Reduce product catalog images and product page base images. Plus a few extra modifications. Below are the specific tasks: 1. Revert the website layout margins back to the original size like Demo (currently, the layout is stretched out too far across the screen) 2. Reduce the product image size on the catalog pages to scale 350px squared (currently stretching to 377) 3. Reduce the produce image size on the product pages to scale 350px squared 4. Change "Featured" section on homepage from carousel to a 4 rows of products (showcase 16 photos total). 5. On the homepage, there is a section with four images. Reduce the image height by half. Maintain same width. 6. Change Pink Borders around the two sections on the home page (towards the bottom) to the same color as background across the top of the website 7. Remove colored background across the top website Need a quick turnaround. Thanks!