Date picker - Can we set limits on the dates so only a date 30 days in advance can be chosen?

One of the fields I want to set up is to ask the customer when they would like delivery of their product with a maximum date in advance of 30 days - how do I do this?

You can use Date Limits option to achieve that. Inside of this guide you can find how to use Date Limits option:

How to Use the Date Limits Option

For your case you should set limit, like this.

Here is my demo form: https://form.jotform.com/73432043003945 

Hope this meet what you are looking for.