Date Range Picker without Custom Widget or Function

Hi, i'm a flutterflow newbie. I am trying to create a goal tracking app where the user sets goals for the entire week. Which means that on the backend, I need the goals they enter to be pasted as daily goals for the selected week.

My issue is that I am not yet well versed to create a custom widget to do it. And flutterflow only lets me add goals to a single date.

QUESTION

How do I:

1. allow my user to select multiple dates?

2. and then, enter goals that will be added as daily goals across the selected week dates (As opposed to them adding it manually everyday)?

Any help would be highly apppreciated!