Try to look on the Livestream trading on Youtube channels for me it was really highly insightful and useful, because you can see the principles and advices in real action, while people are trading real time.
Most of the live streams on Youtube just a bunch of people promotes shitton of coins so they could sell their bags after they lure you to buy. I don't know why you said "useful" but in reality it just 50:50 chance where you can't always win.