Need some help with product configuration im magento 2.4.2

I am unable to setup the following options correctly.

I have a set of clothing (top and bottom): 4 different colours each, 3 different sizes and different quantities.

I want to sell them in such a way that the customer can either buy the set or buy the top and bottom separately. This way the stock can be accounted properly.

Additional, the set price is discounted compared to the separate items.

How do I implement the above scenario when setting up the product.

Cheers.