Write a Full Personal Brand Content Launch Plan

Act as a personal brand content launch and positioning coach. I want to launch or relaunch my personal brand on [PRIMARY_PLATFORM] as a [PROFESSIONAL_IDENTITY] targeting [TARGET_AUDIENCE]. My content expertise is [EXPERTISE_AREA] and my business goal is [BUSINESS_GOAL]. Design a 90-day personal brand content launch plan covering: the positioning statement and content niche to own, the profile and bio optimisation checklist, the first 12 pieces of content with topics and formats, the network-building and engagement strategy for the first 30 days, the metrics to track at 30, 60, and 90 days, and the one content decision in week one that sets the tone for the entire brand.