welcome to LQ!!
Somewhere, SUSE has a network configuration tool, but you can also do it in a terminal.
The first two things you need:
1. Verify that SUSE has the right driver for your wireless card.
2. You need to be near a Wireless access point and have the access codes. (Many coffee shops have wireless with no code required)
If you can't find the network tool, just open a terminal and do this:
su # to get admin powers
ifconfig -a #look for something like wlan---this is the device name for the wireless
iwconfig #look for the name you found with ifconfig
#If you're already near an access point:
iwlist wlan0 scan #replace wlan0 with the name of your wireless device. This tells you what access points are in range.
With or without the network tool, tell us what you find and we can give more specific help.