Page Load/Expanding Box

I was seeking advice on making an effect like this one, when the page loads. (Not necessarily the load image, but what appears to be a div expanding to reveal the content underneath!)

And in general, I would love to see some resources for these type of stylistic effects. Like I follow some youtube content (t.ricks, pixelgeek, flux) but I find youtube showing me the same 20 videos no matter what I search for.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)


It’s a page load interaction. Works sort of this way,

There’s a yellow-div set to absolute and full
Inside is the lottie file (arrow with the yellow box)
The yellow-div has a scale of 0 and low opacity and it expands to cover fullscreen