Invite Sentri to your server
You'll need the MANAGE_SERVER
permission in order to invite a bot. If you don't have this, ask someone higher up in the server to invite Sentri on your behalf.
Move Sentri's role
When you invite Sentri to your server, it'll automatically create a role aptly named "Sentri". You need to move this role as high as you'd like Sentri to interact with hierarchically. This means placing Sentri's role ABOVE the highest role you'd like Sentri to be able to take action on, and BELOW any roles which you don't want Sentri to take any caustic actions on (kicks, bans, etc).
Tell Sentri who your admins are
Use !set roles addadminrole
to mark "administrative" roles as admin. This will give your admins access to the appropriate permission tier of Sentri commands.
Tell Sentri who your mods are
Use !set roles addmodrole
to mark "moderator" roles as mods. This will give them access to the commands they need to do said moderating through Sentri.
Set a mod actions channel
The minimum amount of logging required, this is where Sentri will send bans, kicks, warnings, and related punishments. Use !modlogset modlog #channel
to set it.
You're ready to go!
Sentri's got everything it needs to function at it's core, and you can start customizing it's different features to suit your server's needs as you'd like.