Why would you have almost all you need right here and still prefer to learn on telegram?
I mean, the forum has been the best place for those seeking some crypto education to get enlightened. You could start here and maybe go pro later by taking a course in blockchain technology wile reading articles and publications on cryptocurrency but, you hardly need any telegram group to be hooked up with about cryptos.

Besides, there is a lot of spams on telegram and if not properly moderated, you'll be flooded with messages and would fined it hard to follow up.
Not to mention, there are a lot of scams on telegram groups. Perhaps not the admins themselves but the so called pros within the groups. They could take advantage of your ignorance if you ain't careful.