new on OSM

How can I download the map of Iceland. I’m very new on OSM.

Depends on which format you need. If you just need the “raw” OSM data, try this:

I would like to have a detailed map. When I select Iceland to export XML data, the region seems to be too big.

Do you want to have a printed map?

If yes, have a look at the OSM wiki about

If you need it for other purposes, search the OSM wiki and this FAQ site on your own … search for the right keywords.