Good habit to get into, before starting the bike twist and release the throttle, you should hear it closing with a clunk from the carb.
You should be able to see the spark, even faintly. (not advised, but I have held the plug to feel if something is happening ) Plug should also show some petrol, if completely dry check tank / tap / carb. A small amount of two stroke mix down the plug hole might be all it takes to get it going. Good luck.