I am using Manjaro(Arch-based Linux). And, I had installed Avro using the following command by getting help of the documentation

yay -S ibus-avro-git

Avro is software using that software user write Bangla fonts. But, I don't know how to start it in Linux. Using the help command I get

ibus help

Usage: ibus COMMAND [OPTION...]

Commands:
  engine          Set or get engine
  exit            Exit ibus-daemon
  list-engine     Show available engines
  watch           (Not implemented)
  restart         Restart ibus-daemon
  version         Show version
  read-cache      Show the content of registry cache
  write-cache     Create registry cache
  address         Print the D-Bus address of ibus-daemon
  read-config     Show the configuration values
  reset-config    Reset the configuration values
  emoji           Save emoji on dialog to clipboard
  help            Show this information