Need poster printing advice

Hello r/design,

I figured that maybe this is the best place to get help from so I thought I might give it a shot. I found these rather cool looking Half-Life posters and now I would like to print them to put them up in my apartment. I am really unexperienced with stuff like this, so I am not sure how to do this. Just printing the 1920 × 2967 jpgs in a big size (50-80cm in height) won't look good I assume. So what to do now? And what else do I need to consider when letting them being print?

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted July 23, 2017 at 12:46PM by Jamaleum http://ift.tt/2vxUWrE