getting Shipping options in code (and pre-setting them in order)

My idea is:
I already have a shipping service selection on the Cart page because of extended functionality when selecting one of the services.

My questions are:
1/ am I able to get the values set up in the Shipping options somehow? Prices / labels… So I dont have to hardcode these values if i need to list them somewhere via code: https://support.wix.com/en/article/wix-stores-a-guide-to-setting-up-shipping-delivery-and-pickup

2/ Am I able to pre-set the shipping option via code, so it is ready on the Checkout page? At this point I have the selection on Cart page, however I didnt find the way how to mirror this into the order (or let’s say Cart values, because the order didnt happen yet). Meaning now the customer can easily pick some values in the Cart and completely different in the Checkout…

thank you!