How to write an introduction is indeed a challenging job for a newbie. But I think it will be easier for you since you have written the whole report yourself. Knowing all the details of a report will certainly help you draft a clear and concise introduction.
Let us take a quick look at the basic parts of an introduction:
The Background – Give the present state of the topic you are writing the report about. Keep it short, usually no more than a page long.
The Problem - This is where you discuss the reason why you are writing the report. Discuss the problem that you are trying to solve. If written correctly, this will give the reader enough reason to continue reading the rest of the report.
The Proposed Solution – This part gives you the chance to present your own method of solving the problem. Tell the reader what makes your solution better than the existing ones.
To help capture your reader’s attention, keep all your ideas properly separated. As a general rule, it is best to discuss one idea at a time. Always use short sentences whenever possible.