PM me & I can email you the JD service manual
It is written in the "mower repair for Dummies " level so it is just a matter of working out which variation you have then following the exact instructions in the order given.
I wish all mower companies did this my life would be a lot easier.
The file is about 30 meg so can not be posted directly.
And yes after the engine has started, the brake, neutral , seat & PTO switches all conspire agains you.