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Prince Harry and Meghan Markle attend an official photo call to announce their engagement at Kensington Palace on Nov. 27, 2017 in London.

Markle got her first official introduction to royal life on Dec. 1 when she joined Harry, 33, in Nottingham, England, for World AIDS Day and was greeted by many well-wishers who came down to see the couple. Even though Markle performed effortlessly during the walkabout and engagements, there will be much stricter protocols that she must master before her wedding day.

When to curtsy and to whom?

Markle won't need to perform a big curtsy but a simple tucking one leg back, with a slight bend in the knee and nod of the head will need to be mastered.

The Royal Family rarely greets each other in such a formal manner outside official engagements, but Markle (and all members of the Royal Family) must greet the Queen this way no matter where they are.

As she is marrying Harry, who will be sixth-in-line to the throne after the Duchess of Cambridge gives birth to her third child in April, Markle will have to formally greet the Queen, Prince Philip, Prince Charles, the Duchess of Cornwall, and the Duke and Duchess of Cambridge this way. Blood princesses Anne, Beatrice and Eugenie, are also included.

SAS anti-kidnap training

After Prince William and Kate Middleton's 2011 wedding, the duchess reportedly had to take a program taught by a SAS personal protection or MI5 officer, and it was described as "very tough, physically and mentally."

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According to Hello, the "VIP kidnap protection training teaches how to cope both mentally and physically. The mental element involves reacting to unusual situations, such as when there was a stranger in the Queen's bedroom— and she just started talking to him."

Markle will learn lessons from passing coded messages to driving in stressful situations.

Knowledge of the workings of the state

Not soon after their wedding, Markle and Harry will undertake their first Royal Tour. This will be the real test as the couple must represent the United Kingdom on wherever their travels take them. The Duchess of Cambridge was given one-on-one lessons to"ensure she has a thorough knowledge of the Establishment."

Already it has been announced that she will join The Royal Foundation — the organisation set up by Prince Harry, Prince William and the Duchess of Cambridge — as its fourth patron after she weds Harry. The royal trio mainly puts their energy into mental health, and it would be safe to assume Markle will find her own niche within this.

No selfies allowed

While this is certainly not a written rule, members of the Royal Family typically turn down selfie requests — the time it would take them to appease everyone just wouldn't fit into their schedule. (Although Prince Harry has been known to take a selfie or two with fans.)

This shouldn't be a problem for Markle though; she seemed to have the gentle decline down pat already on her walkabout in Nottingham when multiple well-wishers asked for a snap. According to Elaine Lui of Lainey Gossip, Markle simply said, "We're not allowed."