Website changes

I have a website in shopify but need some changes in order to be launched: i have to make 6 changes: 1. In the homepage remove the requiring email to access so that its free for everyone to enter 2. If you go to “cart” you will see a default “request a quote” that has to be eliminated 3. I have downloaded an app called “request a quote” and has to be installed. So that in the “cart” it has to be removed “check out” for “request a quote” 4. Once you select a product and select check out the website brings you to pay. That page where you have to pay has to be removed temporally 5. It is necessary to add a banner with the cookies policies. If the client does not accept then he cant go in the website. The policy is written down at the bottom of the home page 6. It is necessary to include a “lease term” where the client will choose from 3-12 months and prices will vary within the rental term. I have an example of what i need from another website