create manually Image slide

It depends on what you are looking to do. Do you just want to show images on a page? You can use the Repeater web part to display a list of the images/items on the page. You will need to create a transformation that will contain the HTML structure for the items. Then use javascript/jQuery for the slider functionality.

Here is a wab part that might be useful: Image Slider

If you want to make like a home page hero that slides you can create a custom page type making it easy to add/modify the hero images & associated text/links, then create the transformation for the page type and list them on a page with a repeater, again using js for the slide effect

Jquery Carousel
Create page types
Transformations
Loading data on websites

As Laura asked, it would be good to know exactly what you're trying to accomplish. In general for slider functionality I prefer go with a utility like Slick Slider. Ken Wheeler has put together a very robust slider that is easy to customize to your needs. Unless you're using the slider extensively throughout the site I would drop in the Javascript webpart to call the plugin and your init file as needed.