Learnmeabitcoin.com provides basic information about Bitcoin and miners.
As other senior colleagues have stated, you must be cautious with telegram groups. This is not to say that you cannot learn from them, but as a beginner trying to learn more about Bitcoin and mining, a telegram group is not the best place to start. This forum is a place to get proper orientation and guidance; you may be scammed in any telegram group, which is why most of our senior colleagues advise you to avoid telegram.