How begin as knight of Amra

In a world ruled by men only the noble Knights of Amra, an order of trained female warriors, descents of the Amazon tribes, fight for honour and justice, proving that the cruelty of men can only be answered by the fearless sword of a woman.
Alicia a young and hopeful knight, who left her home to serve the King of Amra, learns the hard way that life is brutal and unfair when she nearly loses everything on her first quest for the king. But instead of giving up, she rises again, becoming a true warrior and a real knight of Amra in the process. But when a devastating war against a cruel and hardness enemy appears on the horizon and threatens the very existence of the Kingdom of Amra, she has to outgrow herself and become the greatest female knight the world has ever seen. If she fails, the kingdom and the freedom it stands will be lost forever.

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It may be a good idea to read more of it if you want to become a warrior in this new life or yours.