To pass leads from Google Sheets to Orca with Zapier you'll need to set up your spreadsheet properly, otherwise the Zap may not work.
Your spreadsheet must have a header for each column, a column designated for Linkedin profile URLs, and at least one row to test the Zap.
Once you've successfully tested the Zap, you can start adding leads to the spreadsheet. You can do this one-by-one or in-bulk.
There are limits to the number of tasks Zapier can run based on your account type.
If you need help setting up your Zap, check out this article on How to pass leads from google sheets to Orca with Zapier.
Alternatively you can also pass leads to Orca by importing CSV.