I need some help tweaking my shopify store

I'm looking for some help with my shopify store. I would like to add a template to my product pages so when I add a new products I have an existing format for all my products, basic information such as returns, buyer guarantee and payment images. This is my main focus, however there are also some other areas I will need help with. People with Shopify and E-com knowledge welcome.

Look forward to your reply,

Eddie