Invite directly: from Find Creators or inside the campaign: send terms, the creator accepts, done.
Review applications: creators apply to open campaigns; you see their profile, Artec Score, and stats, then Partner or Reject. Applications carry an expiry date set by the creator, so don't sit on good ones.
Share an invite link: generate a link (optional expiry and max uses): any creator who redeems it joins as partnered immediately. Great for creators you've already vetted elsewhere.
Partnering opens a chat thread with the creator automatically, and requires your wallet to cover the new deal: if it can't, you'll get an exact top-up amount to add.