Well you did the right thing by signing up here. I had no idea of this forum's existence before. I think you can start off with never ever sending anyone any money. If a Telegram admin messages you, they are a scammer. Always check the SSL certificate of a website and never trust anyone from twitter. All those messages under Vitalik's post are from scammers with his username and profile photo. So you alwyas have to assume everything is a scam unless proven otherwise.