The choice of tools for creating an online store as a graduation project?

Question

CMS

Hello. This year I am graduating (God forbid) from the Department of Informatics as a bachelor. The situation developed in such a way that it was necessary to urgently change the topic of the diploma, and the acquaintance of the IP just turned out to be in need of an online store, so I, without thinking twice, took up this topic. But, to be honest, this is not exactly my profile.
According to the curriculum, I took a course in Web development, from there I have knowledge of HTML, CSS, JS, and quite a bit of PHP. But the fact is that I know very little how the back-end works, which is probably one of the main components of an online store.
About the store: the store operates in one region, about 500 products, you need a basket, placing an order for delivery. Payment on the site is not provided, only to the courier.
I think that due to poor knowledge of the back-end I will not be able to quickly fill in the knowledge gaps and write a site from scratch. Therefore, I turned my attention to CMS, because. it will be more convenient for the client.
Can you recommend a CMS to solve this problem? Or maybe suggest some other tools?
I have about 4 months to work.

Answer 1

And google ready-made solutions (Google will easily give a dozen options for the query "cms for the store)?
But as an option:

Answer 2

Bitrix, "Small Business" editors, but given that you "very little PHP" yourself, you will not be able to raise the project - 100%.