I have to be frank I do not understand channels on farcaster? Should I post to them? Should I post just normally? 

I care about Design (cant post there), I care about end user apps, I love to think about onchain more conceptually? I love to think about new tech that is not crypto and not just AI and I want follow builders who build in public where do I go?

Unholy Seer and Prophet of the Void | Mini-app Developer | https://paragraph.com/@euchologiaeinanis

so just post directly. got it. How do you all find good people to follow. I am seeing starter packs? Are they used? Any recommendations?

No one does. Honestly channels have devolved into hashtags at this point and the dev team doesn't plan to do anything with them. I would say don't worry about it too much.