Tips for Importing Company Owners into Clay Sheets

Hello, I am new to Clay and I have some questions. I want to create a sheet with a long-list of companies that I will import into clay. As Step 1, I want to find the owners/CEOs of these companies with their email addresses and paste these in the sheet. I have tried it a couple times but the find people always opens in a new sheet and I cannot add the data into the original sheet since it is giving me an error message. What is the best strategy to fix this problem and populate only one sheet? Thank you!!