A sense of community is very important during a ritual of this type. The ritual should basically remain the same because common experiences build group unity. Groups expect new members to pay dues either before or during the initiation. The nature and severity of the dues may vary but they must be paid. This practice again increases group unity and weeds out those who are not sincere.
Rites of Passages are fairly common births, deaths, marriages all have to be acknowledged.
Training is rarely a goal but it is always happening. If you have new people attending then it is happening. If children are present then you are showing them your ritual. If nothing else your clergy is gaining experience. You should evaluate every ritual you write.