I usually try to isolate/track the problem by the easiest means possible before digging into things too much. Just to verify, it sounds like you aren't getting juice to anything-ignition switch no click-nothing? No headlights or horn? (Should work regardless if ignition on or off). If no power whatsoever you might also check battery cables, they can look ok and be bad. If the horn and or headlights work might check the ignition switch.
Lastly, you said you were working on electrics before it quit. I often have found if something worked before I mucked around with the car, and no longer works after, it can often be traced to what I mucked around with. Not necessarily did anything wrong, but if you disturbance system where some part is marginal it can easily go from working to inop.