Seeking Guidance on GTM Tech Stack and Data Augmentation in Clay

Hi All! My name is Charlie Moss. I have a B2B GTM Optimization consultancy. We do the GTM revenue architecture strategy, implementation, enablement, and execution around both SFDC and HubSpot platforms. I am working with a client on a HS centered GTM tech stack and we need to build out territories and assign accounts for the first time. Closed $15M series A in May. I need to augment data for fields like ARR, # of employees, industry/sector, region/state, etc. Which channel here would I review to learn the most effective way to execute this augmentation in Clay? I also am curious the degree to which Clay could support automation and handoffs with other agents. Apologies for the war and peace intro, but I do not know where to turn in Clay’s Slack. Thanks in advance!