In order to get properties like the Created Date or Last Modified Date you can use the Get List Items activity on your library.
A caml query like the one below will return the properties of all the folders in a SP Library:
<Where>
<BeginsWith>
<FieldRef Name=
'ContentTypeId'
/>
<Value Type=
'ContentTypeId'
>0x0120</Value>
</BeginsWith>
</Where>
You could also use a CAML query which returns all items at a certain path (including your folder), like the one below:
<Query><Where><Eq><FieldRef Name='FileDirRef' /><Value Type='Text'>/sites/jerrydev/doc2/Fred Beans Group (PA)</Value></Eq></Where></Query></View>
The documentation on connect should help you understand how to use these queries. You could also try SmartCaml (free app on the Microsoft Store) to generate queries for you automatically