Website development strategy: which way to choose?

Question

Parsing

Hello! You need to create an online store for spare parts. I’ll make a reservation right away that only one supplier provides the API, which makes up 5% of the assortment, which means that no one provides the API.
I've been learning HTML and CSS lately. A little later I’ll start Javascript, and then I’ll have to decide where to dig so that I don’t waste time, because two years have already passed (since I hired the first programmer)
1) if no one gives an API, then there are no options other than parsing . I'm right ?
2) the most difficult thing in this project is that you need to fill in the pages with prices, quantities, names and prices. According to a rough estimate, if done manually, entering into the page code, it will take more than 20 thousand hours and this will be only half. Do I understand correctly that the lion's share here is occupied by the question of the Database and its content?
3) If I am right in the second question, then knowledge in a DBMS is necessary. Where is the best place to get them?
4) How to be further? choose some framework or go the CMS path?
- if a framework, then how?
- if CMS, then how?

Answer 1

1) hire a person who makes a website for you
2) hire a person who will sparse and shove it into the database

Answer 2

Suppliers usually have price lists that they can provide in spreadsheet format. It is necessary to write a parser that will parse them and push the extracted data into the database.