The telegram groups I joined are More than 80% of the chats are boring GIF. If the OP does not manage the telegram group effectively, then I bet it will soon become a spams pond.
If OP is willing to share your knowledge, then you can create a thread in the Trading Discussion section here, which I believe will be more popular than telegram.
This is just my suggestion because I don't think the telegram group is a good place to learn.