My macbook air doesn't recognise logitech v20 speakers

I am so sorry i was convinced by others to buy a macbook air - i had an Asus and i am having endless problems with hardware compatibility that no one seems to be able to help me with my new macbook air. firstly, i now cant connect wirelessly to my networked printer at work - a Dell Color Laser 3110cn and i also cant connect at all to my HP Laserjet 1018 printer (with usb or wireless). I can also not connect to my Broadband Telstra toggle or to the Logitech V20 speakers. NO ONE warned me about this when i bought an apple. I'm so sorry i did!!!