I would like to create tutorials section in my website where I explain how to do certain things related to my store and I at the same time, promote related products.
1- What is the right way of doing tutorial section, shall I use standard shopify pages?
2- Is there a way to insert products in Shopify pages? (e.g. end of each article, I would like to show related products)
Technically it is possible to add new custom pages as well as customizing the existing sections/templates. If you are unsure you may want to consider hiring an expert to do this on your theme.