Need Some changes done to a shopify store -- 2

1- Need "categories" section remodeled to be tabs with drop downs and moved. 2- Need description on product to change with the variant (eg. description changes when you pick a different style) 3 - Need to add a "custom" field that when an amount is input, the price of the product changes. Need these three things completed in full, for the first task, I have attached images below of what I would like it took like like and the current stage of what it looks like.