Costumize woocommerce

Hello! i would like to make some changes to a couple of woocommerce buttons. For example the (add to cart). i have to change it to (bestel nu) because its a dutch website. and there are some other changes i have to make but lets keep it simple for now.

Anybody can explain how to do this? I am not a coder and the only options i see on the web are code solutions. I am willing to try this but i dont want to mess it up. Maybe if someone can explain it clearly i will try it.

The page I need help with: [log in to see the link]