Inside theme settings your have the options to change which kind of cart you want. If you want a drawer open from the side, or you which the user should go to the cart page.
Go to Theme Settings → Cart
Open Cart Drawer
Opens the cart drawer after the user add something to the cart, like this:
Show notification
Shows a small notication in the bottom right corner like this:
Go to cart
Send the user to the cart page after adding a product, like this: