You can set the bot's status by running the -setactivity command.
Firstly, the bot will send an embed where you select the type of status (playing, watching, etc.), or remove the current status:
Then, if you select a type it will ask you to respond with the status
You will also be able to use two placeholders, {users} and {tickets}. You could set the status to
Watching {users} users! and it wil show as Watching 15 users!