How to make the homepage like this

You can set the Featured image to a Background image of a Container Block through the Dynamic Settings.

Something similar is done here: https://www.youtube.com/watch?v=-ZTQP_KA2xE

If you want it to span just 100% width instead, the upcoming GB update should let you do that.

Everything is done, thanks. Just I need a bit shadow to give a final touch.

You're welcome, Vidyut.

Here's a link that may help you with regards to Box Shadows if you don't have GB Pro: https://developer.mozilla.org/en-US/docs/Web/CSS/box-shadow

Couldn't able to figure it out. Can you give me a code?

Hi there,

where is this shadow meant to be on your site ?

Hi, the shadow i want around the query loop or posts containers [I'm using queryloop here for post containing]. Here is the image

Here is my site

Try adding add-shadow to the class list of the Block you wish to have a shadow.

Adding Custom Classes: https://wordpress.com/support/wordpress-editor/adding-additional-css-classes-to-blocks/

Then, add this through Appearance > Customize > Additional CSS:

.add-shadow {
    box-shadow: 10px 5px 5px #000;
}