Captions on the right of image

Hi guys!

As I’m new to WordPress and coding, I have one question that I think is not hard for you hackers to be solved ??

When I’m putting images to my gallery, I would like them to appear with captions on the right side and I think that should be solved in style.css .
Could you please help me and write a code which I could insert in style.css or somewhere else so my captions could appear in that way?

Thanks in advance!