I don't think Bitcointalk needs a telegram, Skype, Discord or some other mediums, here in Bitcointalk you will get straight away answers. for any doubts. here we have Trust system utility, whereas in a telegram there is no such system.
-WGB
This is a group for users who need to give services and make friend which we cannot do here as there is a great official rules here. So this group will help people to get instant answers to there problem and can also discuss there services.This is for the topics which people here do not answer.
You can try joining once and helping others.