/help for start.
You can configure Rainfall as you want using /permission command.
You can change language using /language command.
You will know why bot doesn't want to work.
Initialize private VCs system using /voice init command and let users create their own VCs.
Create menu with roles using /rolemenu command to let users select roles.
Create mute or VIP role and give it temporary using /temprole.
Create role which Rainfall will give to every new member using /defaultrole.
Save users' roles even if they leave your server using /saverole.
/avatar, /banner.
/sticker, /emote.
/kick, /ban.
/mute, /unmute.
/deaf, /undeaf.