In order to import your contacts from iCloud account- first you need to export them as vCard file.
If you already have the vCard file- follow instructions: How to import your client list?
Export your files by following these steps:
- Connect to your iCloud account using your Apple ID
- Click on Contacts icon
- Select contacts from the list
- Click command menu icon on the button left corner
- Select "Export vCard"
- Save the file to your computer