I've been learning Bridge bidding from Audrey Grant's Club Series book, which I think is SAYC. However, I've heard that expert players use a modified 2/1 for natural bidding. I'd like to become an expert player, so is it a waste of time to continue learning SAYC when 2/1 is better? Also, do I need to learn a natural bidding system or can I learn an artificial system instead? I want to become a good player as fast as possible.