Would it be good solution to create 3 templates from same document type maybe?

I dont know what is the best practice to do it.

I'm not sure if I understand what you are wanting to do. It sounds like you want to present a news story in one of three formats. In this case you would have 3 views(templates) for each NewsItem. If you are wanting the newsitem to display in one of three ways, then you will need a Property on your newsitem to allow your code to know which way to display the newsitem. A bit of psuedocode below. Assume that News is the parent Document Type and NewsItem is the child. Your news.cshtml file might look like:

@inherits Umbraco.Web.Mvc.UmbracoViewPage<ContentModels.News>
@using ContentModels = Umbraco.Web.PublishedModels;
@{
    //Partial view that can be palced on any skin.
    Layout = null;
    IPublishedContent theNews = GetNews();
}
<h1>News</h1>
@foreach(News itm in theNews)
{
  switch(itm.NewsFormat)
  {
    case "Format1":
      @Html.Partial("~/Views/Format1.cshtml", itm)
      break;
    case "Format2":
      @Html.Partial("~/Views/Format2.cshtml", itm)
      break;
    case "Format3":
     @Html.Partial("~/Views/Format3.cshtml", itm)
      break;
    default:
     <div>No format Available for news</div>
      break;
  }
}

What the above code does is basically leverages the power of MVC partial views so that your data is separate from how it is presented. I believe that the following link kind of explains a bit of pre-requisite knowledge:https://our.umbraco.com/documentation/Tutorials/Creating-Basic-Site/Articles-Parent-and-Article-Items/

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