Considering the exposure that the supposed community members will experience and possibility of hijack of the group by scammers or spammers, on a second thought, can Op instead created a self moderated thread in the forum and manage it? By this the activities going on in the group can be monitored by the community members.
That would be optimal but taking into account the OP has not been active in his account since May then it is fair to deduce that they have lost any interest in creating a community like that, however I agree that if anyone was interested in doing something like this telegram is not really the right platform to do it, since the amount of scammers which are moving in that platform is so high that I have little doubts a great deal of people will fall into different scams and then the group will eventually disappear.