It is easy to use your Pipedrive contacts in an email campaign on Skyp.
In Pipedrive, go to the List view and click export. Here is the Pipedrive article on how to do that.
Export that list as a CSV (comma separated file).
Log into Skyp.ai and create a campaign
On the Choose Contacts page, select "Upload CSV" in the upper right
Choose your CSV and click "open" (on Mac)
The contacts will be uploaded to your Skyp account and added to your campaign.
Note that some users will not have permission to export contacts. Check with your Admin if the option to download a CSV is not available to you on the List page.