The first step would be for You to visit the Nairobi Coffee Auction which takes place every Tuesday,there was one held yesterday . From there You will learn about the different grades of coffee,cupping,how the auction works etc .
Secondly,where do You want to export Your coffee or tea to ?
Kenyan Coffee sells well in Europe,its now making entry into America but yet to enter into Japan ( their populace are large coffee drinkers ). This is a traditional market for Tanzania and Ethiopia Coffee .
In a nutshell,are You already farming in coffee or u wanna be a trader ? If so which markets do u want to venture into. Same scenario with Tea ...