:welcome:
First thing sit in the mower and check everything is set properly.
Moer than one time I have had a mower fail while testing then it refused to start becaue some clot forget to turn the PTO switch off.
Bugger when you only have yourself to blame.
An old headlamp and two lengths of wire is all you need.
One end on the ground terminal and the other with about 1/2 bare wire to do the testing with.
Start with the battery itself.
If the light comes on bright and stays on bright then the battery is OK.
If it comes on dull or gets duller during testing it needs a charge or is deceased.
Next move to the hot ( battery side ) terminal of the starter solenoid OK ?
Then follow the thin wire that is also on the Hot terminal to the fuse and check for power each side of the fuse.
Follow this wire up to the ignition switch. If you can get to the back of it check for power there.
If not pull the plug off the back , it can only go on one way so do't worry about that.
If you can not get to it the remove the switch and pull it soem where that you can access it.
Get that far and post back
I will see if I can dig up a wiring diagrame for your mower as I do not have on on file.
We do not get them down here of if they are imported they get rebadged.