I think Telegram channels can only help you, and can help you enhance your experience a little bit more, but when you depend on Telegram channels to do something, it's definitely bad for you, because then you're just as good. Can't learn.
For me this is not effective because it depends on something to other people will not give birth to good knowledge and understanding. To improve experience might be able to learn many things and it is not only limited to the telegram channel because there are many social media also talking about the same. In the end they will ask for payment for all the tutorials they teach and the level of effectiveness may not be fully we can get.
The tendency of learning in others is good as a comparison material, but when someone cannot make his own study it will be very unfortunate. Learning from others to increase knowledge is not a problem and we are also required to have alternative knowledge to decide before drawing conclusions.