in this tuto, I'll show you how getting Drupal 8 Field image in Twig.
Print unlimited image field in node.html.twig
print one image field
in node.html.twig:
in paragraph.html.twig:
using https://www.drupal.org/project/twig_field_value module:
to get image attributes use:
Alt: {{ node.field_name.alt }}
Title: {{ node.field_name.title }}
Height: {{ node.field_name.height }}
Width: {{ node.field_name.width }}