英语改错问题,帮忙解答一下,哪里有错误,谢谢!ThisisfirsttimeIspeakinEnglishbeforesomanypeople.Ifeelnervous.ButI'dliketousethethisopportunitytointroudcemyself.Ihopeyoutoknowmebetter.MynameisLinHua,andI'

　　英语改错问题,帮忙解答一下,哪里有错误,谢谢!

　　ThisisfirsttimeIspeakinEnglishbeforesomanypeople.Ifeelnervous.ButI'dliketousethethisopportunitytointroudcemyself.Ihopeyoutoknowmebetter.MynameisLinHua,andI'mfifteenyearsold.I'vebeenquitehappliyinthisclass.WelearnEnglish,Chinese,matheaticsandseveralsubjectstogether.Weplaygamestogetherinthebreakandafterschool.Wehelpeachotherwithourschoolproblems.Ifeelinhomeinthisclass.IlikeEnglishandChinesemore.IhopeIcouldworkasannewspapermaninthefuture.

　　帮我找一下关于这里的错误,谢谢!