Please check grammatical mistakes
 

Introduction

After the demise of Humayun, Akbar ascended the throne. He faced numerous difficulties, because of his father who had left the unconsolidated empire in fits and starts. It became a herculean task for a teenage prince to sustain such an ill-organized empire which had become an archilles' heel for the opponents at that time.

After the demise of Humayun, Akbar ascended the throne of India. He faced numerous difficulties, as his father left an empire in doldrums. It became a herculean task for a teenage prince to sustain such an ill-organized empire which had become an Achilles heel for the opponents at that time.

Your Idioms are not used in proper sense. In fits and starts is referred to a work done half heatedly and intermittently.Usage of Achilles heel is also dubious. Here your idiom gives another meaning. Please check the meaning of idioms before or after using them.
Your last sentence does not make a clear sense and it suggests that your thoughts are not clear.

Dont over-burden each and every sentence with idioms use simple language with simple sentences.

Thanks, I will try to use idioms properly. Please keep in touch, will bee needing your expert advice.