Hi, newbie here 
I recently purchased a laptop for the first time in my life and I am trying to connect it to a wireless connection, which I have never done as well. I am using a Westell 7500 modem provided to me by Verizon. I did a bit of researched and apparently (if I'm correct) I don't need a wireless router or any other devices to get wireless internet.
If I am correct, I went to my modem's IP address and turned on wireless. I set up and changed the SSID and enabled a pass phrase, and I connected to the network at the bottom right. It connects, but there is no internet connection. What I mean by this is that it connects to the device successfully, but there is a triangular yellow warning sign with an exclamation mark on my internet bar at the bottom right and in my "Network and Sharing center" it says "no internet access."
Am I doing something wrong or do I need to buy an wireless router? Any help would be appreciated, thanks. 