From our human perspective, the Trinity is hard to visualize.
How can one being concurrently exist as three distinct persons?
This concept will be easier to understand once we get to heaven and are unconstrained by time and space.
In the meantime, an imperfect analogy for the Trinity is an image that exists in three digital formats, e.g., JPEG, PNG, and PDF.
The image is identical in each format.
It is composed of the same binary code in each format, i.e., zeroes and ones.
However, the functionality of the image differs by format.