hi I bought a turbo ticket for a basic need on shipping on my webstore however for lack of support by commerce guys they were not able to sort the issue out. I found a big lack of documentation on how the shipping rules are structured and what are the main differences between

services
methods
rules and conditional rules

why some conditions or actions can be set into services or either methods or either rules is not clear to me -
i need to setup shipping rule based on shipping address and size ( 3 different sizes) of products to apply three different service rates .

that simple but not sorted despite turbo ticket.

hope someone can address me to the right literature-manual for understanding myself how it works.

thanks
milplus