How can I set the minimum amount based on the shipping method?

Hi,

I may not have understood your question correctly. But it looks like you are trying to set up a minimum purchase amount based on shipping method.

In that case, under General settings, set the Amount limits as Minimum and the Amount types as Sum Then under the Shipping tab Enable the section and under type select Per shipping method. Save the settings.

You can then set the minimum sum for each shipping method.