There's an overview chart here: https://cph-prod-cdn.azureedge.net/49c39f/globalassets/8.-om-cph/6.-investor/selskabsmeddelelser/2011/august/cph_shopping-online16.03_final_air.pdf
As you can see terminal3, finger C is quite long so much depend on which gate you land in. There walkways, but it will take some time.
terminal 1 used to be the domestic airport, but I don't know who fly there now. It is in Zone 8 on the chart.
The following time (gu)estimates are based on what I can remember from last time I traveled by air.
Getting out of the plane: 15 - 30 minutes (depends on the size of the plane
From end of finger C to immigration: 400 meters - 10 minutes
Immigration: 5 - 90 minutes (depends on who else lands at the same time)
From immigration to Terminal 1: 600 meters - 15 minutes
I can walk faster than that, but not if the airport is full.