Marketing for a dropshipping website in Egypt

I have a drop shipping website targeting Egyptian market only. The website has around 400 products. Depending on your marketing research, we will either keep the website with various products, or maybe it can be a few or one product store.
The task is:
1- Help identify which product sells best
2- Marketing research
3- Make ads to sell these products.

It is important that you know the Egyptian market, or you have done marketing activities for Egypt before.