Arduino for absolute beginner. LedMatrix 8x8

Hi I want make a simple project in which, I want play with a Led display 8x8 .I think I need :

A led Matrix 8x8
A wifi transceiver ESP8266
Arduino

I would like to know, which type of Arduino and the relative battery is recommended.Is there in this forum anyone has made the same project.?

Sorry, Wifi module, for I-phone connection.