Fastest Ways to Learn Building Custom Signals in Clay for B2B Marketing Leads

Hi everyone, Josh here I literally just got set up. What I do: I provide marketing services to companies that sell B2B services. My clay goal: is to become excellent at building custom signals to help me find warm potential client leads My question is, as someone who has just discovered clay what's the fastest way for me to learn how to build custom signals? Is there anyone I can reach out to for help or any suggested videos on how to build them from scratch? Thanks