No start up

You need to be more specific with your info. 'nothing' What does that mean?

Does it mean you can crank it by "screwdrivering" the relay? No? Yes? Does it crank if you jumper the two starter terminals? Yes? No?

Is this a stick? Auto? Do you have a clutch safety switch?

Look under the hood. Is there a metal box looks like a horn relay which has a big reset push button?

Have you done any testing? Test light? Meter? Clip leads?