Build me back-end in flask for website

I want to make website in flask as back-end framework and no front-end framework. The pages are already designed in html/css/JS. The database in mysql is already designed. Only back functionalityneed to work as follows in flask:- 1. the first page will do login/registration/logout. (1 SELECT query to check login) 2. After login user can goto his product (2nd page) that should get show. (1 SELECT query to get product for that customer) 3. After seleting product goto 3rd page then every product has its type (3rd Page) that should get show. (1 SELECT query to get product type for that product) 4. After seleting product type goto 4th page then every type has its model (4th page) that should get show. (1 SELECT query to get model for that product type) 5. On 5th page will have 2 tabs (1. Search Customer, 2. New Customer). Here user can enter new customer. and search customer. Every customer has multiple location. So while searching customer, the list will show customers and their location. Every location has multiple quotation. Here quotation number will get generate or if user will select existing quotation then it should edit/update same quotation. (1 SELECT query to get search customer for that login and 1 INSERT query to insert new customer) 6. Then 6th page we have to make quotation for selected model. Here it will fetch value from one table and render. Each value has options. Appropriate option should get select, otherwise it should show error message. After selecting option, every option should have its own price. (1 SELECT query to get product options) 7. On 7th page would be pricing page. Then take this to pricing if user wants to edit price and simple fixed text terms and condition page from database to render at bottom. (4 SELECT query to get cover letter, terms and conditions, Bank details, Statutory Information and 1 INSERT query to insert selected final price) 8. The 8th page is final page and it will take final pricing and make pdf to download.(1 SELECT query to get product's final quote) For first 4 pages it will require 1-2 hr work. (2 hrs) For 5th page 3 hrs of work.(3 hrs) For 6th page half day. (5 hrs) For 7th page half day. (5 hrs) For 8th page 2 hrs. (2 hrs) Total = 17 hrs if you are intermediate.