I haven't joined a paid signal group but I joined a free signal group (which later on, turn-out paid group) and with my experience I can say that it wont help you grow as a trader. The best you can do is learn little by little, dont rush, dont be afraid to make mistake.

All signal group have common factor, they only give signal when the price of coin/s is RED, which is you can simply do it yourself without joining any signal group.