DO NOT INFODUMP! I repeat, DO NOT INFODUMP!
Anything is better than an infodump. Natural exposition, whether it be through battle, an antagonist planning something, townspeople talking, etc., is always better in my opinion.
As a reader, I'm not here to read a textbook about this fantasy world you've made up. I don't care. That's what your goddamn glossary is for.
I'm here for an engaging story that takes place in an interesting world, and storytelling always takes precedence. You cannot make me care about a world when I don't care about the story surrounding it. Any dry exposition takes away precious time from storytelling and will almost indefinitely cut your readers' interest.
You can "infodump," as in giving exposition in an interesting tone or through dialogue; good enough writers can pull it off. But, you CANNOT infodump, as in dropping every detail there is to know through a dry, continuous monologue without action.
I know there's no strict "can's" and "cannot's" in anything, but honestly, I despise infodumps with every fiber of my being (because most aren't written well, especially on sites like these), and if you do it I will :blob_smack: you.
Plus, I feel like so many authors have this weird habit where they believe they need to explain everything there is to know about the world in the first chapter. Exposition takes place across time, and new details being revealed overtime is honestly much more engaging and interesting to me. Infodumps are a dangerous thing, and I think newbie writers should avoid infodumping at all costs and try out more creative forms of exposition.