How do i create images like this one?

I am a website owner, so i need to create unique images, But my images are not up to standard level. What tools do i need to make images like this one, and is there any tutorial on this topic? Thanks in advance.

I am a website owner, so i need to create unique images, But my images are not up to standard level. What tools do i need to make images like this one, and is there any tutorial on this topic?

Thanks in advance.