So I'm writing my first novel(la, maybe) (sci-fi/space opera); and although I am finding it easy to write narrative descriptions of scenes and what's going on, I don't think I'm putting in enough dialogue.

Is there a way to tell if this is the case? Do you have any advice from your own experience about this? For example, is a page of description/narration at the start of a novel a good idea? If I take out the description, how can I get the information across using prose?

I can post a sample if you want. Thanks for any help you can give