Just bought the game, unable to create a character on friend's realm.

[HEC-]

I had to wait 3-4 days to get on Leviathan

You never need to wait that long - it's possible to create new characters every sinle day during off peak hours - all you need to do is to try after about 1 am at night or early morning - worked for me every time on the most pop servers without any problems. SO worst case scenario - half day, otehrwise just 4 - 6 hours.