Problems with getting images for Webpage

We had a number of difficulties with trying to get an image of one website to put up on our webpage we created for our music band. The images we needed were on Facebook, so we decided to send it to the Apple Mac computers via bluetooth from a mobile phone device. This took a while as we had to pair the phone etc so there was a connection between the apple mac and the mobile phone. After pairing the devices together we finally downloaded the image but we had a number of difficulties again because when we downloaded the image the size of it was to small and when we zoomed in the image the quality of it disorted and was not a high quality professional photo. After solving all the technicl problems we found a number of high quality photos so that we could choose the best one to suit our webpage.