Hello!
I believe I can be of service in helping you with this! In fact, I have already implemented a basic search function for your web page. To see it in action, please see this .gif - https://s3.amazonaws.com/dharmatreasure-podcast-feeds/search+[login to view URL]
To get this working, I simply used vanilla javascript, and utilized the search box which was already present in your website's code. Of course it is possible to modify the look and position of the search box, as well as the behavior of the search function - But this should show you that the job can be performed in a timely manner.
If you are interested in working with me, please send me a message so we can discuss the details!
I look forward to hearing from you, and thank you for your consideration.
Best,
Michael Horn