Usages of koni
Mi konas amikon, kiu laboras en butiko apud la domo.
I know a friend who works in a store near the house.
Mi konas instruiston, kiu feliĉe instruas Esperanton en la lernejo.
I know a teacher who happily teaches Esperanto in the school.
Elon.io is an online learning platform
We have an entire course teaching Esperanto grammar and vocabulary.