This stick is only used to connect a device that does not have an integrated WLAN to the WLAN via the USB interface. What you are looking for is a WLAN access point. This is connected to the network like your PC via LAN and then provides WLAN connections (PC independent) as a hotspot. You will find these under Network / Access Points. Depending on the speed, the price starts at around 40 euros. Hope this helps a little?

No, it is not possible. It is not a 3G stick.