Currently, the way to get information on new clients is to create a segment to generate a list of clients that meet the segment rules. You can then download that list or send a message to it.
Go to Marketing > Segment > New segment
Select the rules as per the screenshot below, using the date rules you want
Click "Client count" to see how many people match your rules.
See the details of the new clients
Save the segment (ensure that you give it a name)
Click Options>Download CSV
The csv file contains:
First name
Surname
Dob
Gender
Customer ID
Email
Phone
Referral source
Marketing preference
Address
Days since last visit