Manual Steering Box...assistance needed...
No. Just use the nut to push it on.
It's a tight fit.
Wedge a block of wood between the arm and something.
Got a big box end wrench?
Or a socket with a breaker bar?
It may be optional but it's worth it.
Don't beat yourself up.
Laying on your back and doing this for the first time is challenging even for someone with more experience.