Styling the layout of a content type
You can use node--(machine name of contenttype).html.twig to achieve this thing. 

&lt;div class = "col-md-6 someclass"&gt;{{ content.field_machinenameofimage }}&lt;/div&gt;
&lt;div class = "col-md-6 someclass"&gt;{{ content.field_machinenameofotherfields }}&lt;/div&gt;  


Replace the {{ content }} by the above code. And change the above code how you want to achieve.