You can read the article How to Use Code to Let Your Users Search a Collection to learn how to search a database collection using queries and filters.
You will need to familiarize yourself with basic coding concepts to accomplish what you want. There are a wealth of Javascript coding sites which will help you learn Javascript from basic to advanced - Javascript.info is a good one. The Wix Code Resources page provides tutorials, examples, and articles on getting the most out of Wix Code. We are happy to get you pointed in the right direction, but you’ll need to take it from there. As questions or difficulties arise, we are here to help.
Have fun, and good luck,
Yisrael