To make a gallery on wordpress you can use the VS test block and click Add Media.
Here instead of inserting images individually click on the top left of the Create Gallery to select images for your favorite gallery. Then click on the Create a New Gallery to create the gallery.
Here you can choose the size of the image, you can set the number of columns and you set the link to see the image.
If you are unsatisfied with the look then you can always click on Add Media button to edit gallery settings then click on the pencil icon.