Working with characteristics and variants

-- HikaShop version -- : 5.1.0
-- Joomla version -- : 5.1.2
-- PHP version -- : 8.1
-- Browser(s) name and version -- : Edge 128.0.2739.42

We are in the process of moving away from J2store into Hikashop. Therefore on a product page I want te recreate price options for a product. I have found that this will be accomplished by working with characteristics and variants. But I can't seem to make it happen after spending hours going through the manuals and forums. Is there someone who can help me with this? I'm attaching a screenshot of the current config. It will most probably be something tiny (and or stupid) I am missing.

I've come somewhat further with your explanation. Was able to create the different variants. Two followup questions.
1) When selecting a variant the title of the product changes (above the picture). I've found some forum posts about this issue and found that this involves changing the file show of the view product php. But I can't seem to find the proposed syntax in that file.
2) Adding a product to the cart it shows a pop-up that this has happened. But that page remains the same. I'm sure there is a way that from the moment you press the button the screen goes to the cart directly.

Greets,

Nicolas, sorry to bother you again. Hikashop is completely new to me. The forum has helped me out with several things already. But getting stuck a little again.
1) Found the correct file. I think it is this syntax that I need to change:

<!-- NAME -->
		<span id="hikashop_product_name_main" class="hikashop_product_name_main" itemprop="name"><?php
			if(hikashop_getCID('product_id') != $this->element->product_id && isset($this->element->main->product_name))
				echo $this->element->main->product_name;
			else
				echo $this->element->product_name;
		?></span>