How do i change the post-look on the homepage?

I know this is a noob-question, but i'm not very experienced. So sorry for this - maybe stupid - question. ^^° I wanted to know how i can change the look of the posts at the homepage. I'd like some to look like the first row at https://catchthemes.com/demo/fotografie/ (Human Faces, Photo Editing and Made by Originals). A picture with overlayed title. Sorry again. I'm really trying my best. :D