I started messing around with it with PIC microcontrollers because you can buy the chips for $1 a piece (they used to give free samples, you got ~5 free at a time) and the development board was cheap too, $20-30.
you could program the pic's in their assembly which was well enough documented, or C, but I think you had to pay extra for C.
if you want to be a faggot though just get a NuPi.