Using Clay to book more calls for our agency

Hi ya'll. Quick intro: I run an email/SMS marketing agency for DTC brands called E/X based in Miami. Looking at using clay to ultimately get us more calls booked. I have absolutely ZERO clue how the F to use clay right now.... I just know from what I saw, it looks badass. We've typically had agencies handling our outbound but its been very much up/down.... they typically don't send great emails, don't test enough etc. So I'm looking at doing it internally as well.