To be honest, I don't trust telegram signal group. And that one you are about to join has a huge membership fee.
Usually, those signal groups has $100 to join and you can upgrade your membership fee with additional $100. And don't just rely on those telegram groups. They are not 100% accurate and will not guarantee you profits. I mean, I myself did not gain from that tg signal geoup I had joined before.

If you wanna learn, there are available content, video tutorials and threads here in forum that may eventually help you to improve your trading skills.