I really can't hear very well and was told by a friend about digital hearing aids. I need more information. Is there a website that could tell me more about them?

The best thing would be to use a trusted and impartial source. In this case you'd go to the AARP which would have your interests at heart. Their page on this topic is at http://healthed.aarphealthcare.com/ArticlePage.aspx?CategName=Hearing%20Loss&TopicName=Resources&ArticleTitle=12_How_to_buy_hearing_aids_for_the_first_time_FINAL.