need help configure sonicwall 4060 pro

I don’t know much about sonicwall.
I have use the wizard to guide me through.
my lan ip is 10.87.1.1 with submask of 255.255.255.0 and my wan 65.60.121.235 with submask of 255.255.255.248 and gate of 65.60.121.233
my bridge (T1)is 65.60.121.233
from my lan i could not ping wan gateway? what do i do from next?
second how do i set a dmz on it also