Questions on Merging Emails and Google Sheets Account Upgrade

Clay Support I'm on Lesson 4: Exporting, and I have two questions. Firstly, is how do I merge emails from two seperate columns into a third, merged column. Yash brushed past this pretty quickly. Secondly, I don't see a way to "lookup, add, or update row" in google sheets without upgrading to a paid plan. In order to "add google sheets account", It's saying I have to upgrade to unlock the feature. Is that the intention? Will I need to pay for an upgraded account in order to complete this lesson?