Product layout change for Opencart website with default theme.

I have a long developing Opencart Marketplace website which has a lots of custom works.
I have tried to make it somewhat similar looking to Amazon website as it will load some Amazon products if a customer selected a product or searched for product.
Even now, my website product layout is somewhat similar looking to Amazon page but I need to make it more similar to Amazon product layout like moving my reviews and Questions and Answers links etc like in Amazon.
Also, I want to add a New Best Seller page page I want to show the Best Seller logo like in Amazon.
This change must be good all devices.

Here is a link to a product page which has some dummy reviews and Q&A.

https://www.hadhiyaa.com/shop/index.php?route=product/product&product_id=60


Note: From my experience working such issues before, these tasks are very easy and quick work for experience people. Some of them are doing/fixing these things for me at a very good price. So, my MAX budget for these works are $50.
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