Appropriate tankmates for Corydoras

Hi I'm planning to start an aquarium with a small variety of corydoras. I
was planning on putting 5 of them together in a 12 gallon aquarium. I
haven't purchased anything for the tank yet so any advice on aquarium
furniture (I was thinking aquarium wood) and appropriate live plants would
be great. Would guppies be a good tankmate for them? If not what would be a
good choice? I would like to avoid neon tetras or zebra danios as I already
have another tank with those types of fish. As I'm sure you can tell from
this post I'm pretty green when it comes to home aquaria so I would like to
avoid any highly demanding plants or fish. Thanks for any advice!