Difference between Soon and Shortly

SOON vs SHORTLY: ADJECTIVE

Immediately.
Before the usual or appointed time; early.
With willingness; readily.
Without hesitation; promptly or speedily.
Just prior to something; shortly.
In the near future
Promptly; quickly; easily.
In a short time; shortly after any time specified or supposed.
Without the usual delay; before any time supposed; early.
In the near future; shortly.
Early
Within a short time; quickly
Immediately, instantly
As soon as any; among the earliest; too soon.
At some uncertain time in the future.
As soon as; or, as soon as the time referred to arrives.
Immediately at or after another event.
Readily; willingly; -- in this sense used with would, or some other word expressing will.

Early; speedy; quick.
Lief.
Betimes, etc. (see early), promptly, quickly.
Synonyms and
Readily; willingly; gladly: in this sense generally accompanied by would or some other word expressing will, and often in the comparative sooner, ‘rather.’
Quickly; speedily; easily.
Early; before the usual, proper, set, or expected time.
Early; before the time specified is much advanced: when the time, event, or the like has but just arrived: as, soon in the morning; soon at night (that is, early in the evening, or as soon as night sets in); soon at five o′ clock (that is, as soon as the hour of five arrives): an old locution still in use in the southern United States.
In a short time; at an early date or an early moment; before long; shortly; presently: as, winter will soon be here; I hope to see you soon.
At once; forthwith; immediately.
(idiom) (sooner or later) At some time; eventually.
(idiom) (no sooner … than) As soon as.

Later, Once, Before, Slowly, Promptly, Someday, Speedily, Immediately, Swiftly, Imminently, Sometime, Quickly, Before long, Presently, Shortly

Sometime, Promptly, Later, Immediately, In short, Concisely, In brief, Not long, Not far, Before long, Presently, Short, Curtly, Briefly, Soon

Forthwith, Pronto, Next, Later, Once, Before, Slowly, Someday, Immediately, Swiftly, Sometime, Quickly, Before long, Presently, Shortly

Swiftly, Sooner, Recently, Earlier, Quickly, Early, Sometime, Later, Immediately, Concisely, Before long, Presently, Short, Briefly, Soon

You should receive your first job alert soon.
Europe soon, although I would absolutely love to.
Soon afterward photographers from Canada and Australia followed.
European Jews, who believe rescue will come soon.
But everything will be back to normal soon.
How soon may I begin to notarize documents?
You know the money is coming very soon.
Biopsy or autopsy tissue: Collect autopsy specimens as soon as possible and biopsy specimens as soon after onset of symptoms as possible.
The setup of the custom list and workflow required for this functionality will be posted soon as soon as someone requests it.
This CD was soon to become their lasting momento as the band split soon after, and were promptly then played by Radio One!