@sai147
Adding an rss feed requires that you be proficient with javascript and have an understanding of the structure of your target feed(s). If you find following the online examples difficult you will probably have much more difficulty implementing your own solution. Cut-n-paste will only get you so far.
Rather than spin our wheels guessing at what might be your problem or having a javascript training session let me propose that you take the initiative to post a small version of your project, some details about the rss feed, any code you have already written and where you are stuck. If you are opposed to working in the open considering hiring one of our community members to craft your app for you.