Searchable Database development

Hello,
I am very new to WordPress. I need help getting started on a project.
A client has an existing WordPress website and wants to improve the search options.

They have hundreds of articles and presentations.
How can I create a template database for them to input all this materials?
Here is a description in the client’s request.
Thank you soo much

Description: Develop a searchable database to encompass the following types of materials:

1. Titled works, e.g., published papers and books, videos and other audio-visual materials, PowerPoint presentations, unpublished manuscripts and documents, posters
a. Search by title words, author, date, source, page number?, topics
2. Photo gallery, e.g., scenes, geology principles, locations, objects, fossils, living organisms, topics
a. Search by location, topic, common name, scientific name (fossils and living organisms)
3. GRI activities, e.g., staff names, research topics, seminar/conference locations, seminar dates
4. News topics from the web, other sources
a. Search by topics, location, name of organism, date