I just want to be near this result because I really love this kind of picture

What exactly is it about these images that you "love"? The importance of the camera, lens, and film varies with your objectives. What you want might be doable digitally. Or it may be an artifact of the digitization process.

I'm not photographer & I don’t know the exact terms

You should learn general photography first. As you acquire the vocabulary and knowledge needed to adequately describe what you like about these images, you will likely also gain the skills needed to reproduce them.

1. Get a digital camera. Consider mirrorless with a kit lens and nifty fifty to start. You can get a previous-generation model fairly inexpensively.

2. Read the camera manual. For every setting described in the manual, go out and take pictures using those settings.

3. Read a general photography book. Consider visiting a library and flipping through several different books. Look for one that focuses more on photographic content and techniques than technology. Many books about "digital" photography waste too many pages describing out-dated technology that is found in the camera manual or Wikipedia.

4. Apply concepts you read about to the images you take.

5. Examine your pictures for how you'd like to improve them.

6. Keep taking pictures and learning new concepts.

7. After learning the "basics" on digital, consider switching to film, if that is the path you'd like to take.

I was searching for what kind of camera this photographer used...

Without asking the photographer, it is unlikely the specific camera can be identified. Though, as others have stated, it is possible to identify properties of the camera that was likely used.

Similarly, the photographer would likely have to be asked about the specific lens used. However, someone who is very familiar with the characteristics of a wide range of lenses may be able to identify properties of the lens beyond focal length and max aperture. For instance, the bokeh of some lenses, such as Cooke triplets and Sonnar, are distinctive.

Even though it says Portra 400 on the border, are these actually film?

It's reasonable to expect that these were taken on film because artifacts typical of film are present. However, someone with great attention to detail could replicate them digitally.

---

Consider getting some Portra 400 film. Throw it in a camera with a decent light meter and lens. No need for medium format, if that's not an essential aspect of what you're after. I'd try something like a Canon T50/T70 with FD 50/1.8 lens in Program mode because they're readily available, inexpensive, easy to use, and produce good results.

Photograph a subject with a limited range of colors on an overcast day. Take the film to a local lab for development. Show them the sample images so they know not to bump the contrast and saturation when making the prints.