I need some edits done to product pages on my shopify theme

Hi there i have a Shopify eCommerce i need to do the following
- Add product photos
- Need a Variation of product 3 sizes with a different name and price.
- Setup popup spinner coupon wheel like https://www.puravidabracelets.com/
- Customize checkout to make phone number optional and to see where i can go to customize this page
- Add product reviews
- Where do emails go?
- Change social network links
- Change payment icons on the footer