I am new to Opencart and need some advice, please (obviously

THE PROBLEM
I am building a website concerning posters and art. Many of them have exactly the same dimensions and price. So, for example I come along and create PAINTING A long with size, price etc. Can I use the same parameters for PAINTING B also or do I have to go through the long process of creating each one individually?
I am wanting to speed up the process as there are over 2,000 images!!
Is it a long process of "burning the midnight oil" and taking until 2017 to get it done or is there a solution?
Many thanks
Copernicus