If you learned something like C (c# c++ VB.net) then the Arduino is best for you. I also got myself a Arduino kit from Funduino. They're very good. They also provide some samples on their website.
If you learned Python then the Raspberry pi is best. You can do much with it.
For me the Arduino is more a board to Control Motors, LED's or get Sensor Values. The RPi (Raspberry pi) is more a Borad to display data or get the data on a website.
You can watch this video series for reference: