How can i make this layout?

I just realized i download the 1.2 version instead of 1.5 haha my bad

how can I make the cards the same height?
plus, why my post title and h1 is always the same? there's a way to change the h1 without changing the title and the opposite?
and i want to make the article title + author to be underline while hover how can i do that while read more button stay without the underline?

Let's handle one question at a time.

how can I make the cards the same height?

Try add this CSS:

.generate-columns-container .dynamic-content-template > .gb-container, .generate-columns-container .dynamic-content-template > .gb-container > .gb-inside-container {
    height: 100%;
}
.generate-columns-container .dynamic-content-template > .gb-container > .gb-inside-container >*:last-child {
    margin-top: auto;
}
.generate-columns-container .dynamic-content-template > .gb-container > .gb-inside-container {
    justify-content: space-between;
    display: flex;
    flex-direction: column;
}

No way to do it with the generateblocks plugin?

If you don't want to use CSS, try setting a min-height eg. 300px to the container block which contains the title and author name in the content template:https://www.screencast.com/t/7OfFRxlWIeTh

The cards in the same height now but the author name is not. how can i fix this and make the images without gap on the sides?

Remove the width (353px)you set for the image.

Done.
how can i make the author same height?

You can wrap a container outside the title, then set a min-height for it.

Thanks for your help Ying!
there's a way to change only the post title? every time i change it my H1 change aswell.
if i can change the title i won't need to use the min-height

there’s a way to change only the post title?

Do you mean the title text? If so, no. The title text is pulled dynamically from your post title.

Alright.
and any idea why i have in the theme editor "generate-child.min.css"?
i didn't have this file in the past

Are you using a child theme?

Yes

Thats not something we include in our child theme. So someone else or another application must have created the .min file.