如果你要求一个初一男生进行简短的英语自我介绍，我认为时间是充裕的。
因为初一学生的英语水平通常不会太高，自我介绍的内容也比较简单。
你可以先是时间充裕，然后是因为初一学生的英语水平和自我介绍内容相对简单，最后可以延伸一些自我介绍的常用句子和表达方式，例如介绍自己的姓名、年龄、爱好等。
希望这个答案符合你的要求。

　　My name is Huang Zichen. And I'm 13 years old. My hobbies are read book and ride bike.

　　.And I'm a person.My favourite are Shu Chang and JJ Lam.I like playing computer game and reading classic

　　in the rest.I'm studying at hongqi centre

　　I am so glad to meet all of you. I will cherish this luck, and make great efforts with you . I am always ready to offer my help. Feel free to ask me if you need any help. It would be nice if you can give me some aid. Thank you all.