It almost has to be "something you did"
The basics. Compression, Fuel, and Spark
Pull the coil wire, use the key to crank the engine and test for spark.
NONE?
Take your test light and hook to the coil NEGATIVE
Remove the cap, bump the engine until the points are open, and turn on the key. Light should be ON
Bump the engine, lamp should blink on/ off as points close
IF not, you are "in the area."
PROBABLY either the points are not gapped right, or you got the wire connection at the points/ condenser/ wire "leaned over" and shorted to ground.
It's possible but not likely that you have a bad condenser. "New" does not equal "good."