What is the best way/method to work with objects with difficult structure? [closed]

I'm currently working on an online shop, and I receive from the server objects with a rather complex structure (product, user objects).

What is the best to work with objects with different structure? Is there any design Patterns, or other methods?

Now I reading refactoring guru book and my look is on Facade pattern.

Sometimes in my code there are rows like this

this.product?.masterData.current.masterVariant.prices[0];
or
this.product?.masterData.current.masterVariant.images[0].url || ''

How to properly correct such long lines of code, should I create a separate class for this? And if so, which one?