[gsxrken]

Is the trans in neutral? Can you spin the rear wheels when the car is in the air?
Did you remove all the spark plugs and then attempt to spin the engine with starter or pulley bolt?
Disconnect your fuel pump relays to make sure you’re not hydro locking with gasoline.
Hard to imagine in one year of sitting your rings would stick to the cylinders so firmly that you couldn’t spin the motor, but I guess it’s possible. Some atf or sea foam in each spark plug hole and a night of sitting might help cut through if that’s all it is.