How to create a large database of goods?

Question

Database design

A large project of an online fabric store is being prepared for the start (more than 30K positions)
The guys are still working in the old fashioned way, there is no digital at all.

Tell me from experience how to most effectively start the process of digitizing the tissue database. What structure?
To then effectively use it on the site, social networks, 1C and other systems at a distance.

Please write the most primitive algorithm.
For example: take a picture - enter a title / size in the field. td...
In what system to do it initially, so as not to redo it later, but it is convenient to work with the data

Thank you all for future answers. I want to collect feedback and not screw up. I understand that there is a lot of work to be done, I do not want to redo it.

Answer 1

With such a number of nomenclature, a source is needed. Usually it is 1C. Do not add by hand.