(blatant plug follows)
Check out a few of these:
The basic modules needed in radio circuits - Parts 1 & 2
This is pretty much the simplest SSB transceiver you can get
A commercially made SSB transceiver
If you want to start more basic, it's worthwhile understanding direct conversion receivers and DSB transmitters before SSB receivers/transmitters.
A simple direct conversion receiver
A simple direct conversion DSB transceiver
Any questions? Ask them here.