Want to build personal collection for Games, Film, Movie Clips etc, Using Base
How to create a layout in grid with images(Like the ref image)
what kind of keyword should I google for tutorials?
Libre Base is a front end to databases. Therefore, it is oriented more toward data than graphics. Your question about how to re-create the image in Base requires much more than a simple answer can possibly give. Base is a good place to store media information such as you stated.
To start, you should read the available manuals for base (click here). There are a number of step-by-step tutorials (and downloadable examples) which will get you started. Also a search on “Libre Base tutorials” should get you a lot of hits.
If this answers your question please click on the 
(upper left area of answer).
Thank you for your advice. I will look at the manual first