You need to be a Workspace Admin for every step here. Everything is under Settings, at the bottom of the sidebar.
1. Connect your Roblox group
Open Settings › General and enter your Roblox group ID. It's the number in your group's address on Roblox: roblox.com/communities/123456/
2. Choose who counts as staff
Open Settings › Activity Tracking and switch on each rank that is staff. Everyone in those ranks appears on the roster, and their time in game is recorded.
3. Set up roles
Open Settings › Roles to decide what each role can see and do, such as who can write in the logbook or approve time off. See Roles and permissions.
4. Add the activity loader to your game
On Settings › Activity Tracking, generate the loader and download it. Put the script in ServerScriptService, then turn on Game Settings › Security › Allow HTTP Requests in Roblox Studio. See Activity.
5. Connect Auto Ranking (optional)
To promote and demote people from Ankra, open Settings › Auto Ranking › Configuration and sign in with a Roblox account that can change ranks in your group. See Auto Ranking.
Activity isn't recorded in Roblox Studio play tests, so your own testing doesn't show up on the leaderboard. Join the live game to check it works.