initiate

Someone new to a field or activity.

People who have been introduced to the mysteries of some field or activity.

“it is very familiar to the initiate”

Someone who has been admitted to membership in a scholarly field.

Bring up a topic for discussion.

Bring into being.

“He initiated a new program”

Accept people into an exclusive society or group, usually with some rite.

“African men are initiated when they reach puberty”

Set in motion, start an event or prepare the way for.

Take the lead or initiative in; participate in the development of.