As I started with the end in mind, I flip the way I usually do personal projects. I started with the website, and doing happy paths POCs just to add more content to the site.
As I work on the site, 3 main audiences came to mind
private, you control who can see your data, Skill tracker, personal development, short term and long term goals, Career development, current role and next steps, organization agnostic, your info moves with you if you change companies, Career path
Share and get to know your team members, Conflict resolution tools, Trust building, Goals, Norms and processes, Discover the landscape
Inspire, Anonymous Aggregated information, feedback, reward, incentivize and influence.