Macs doesn't have right click buttons, something that often confuses new “switchers”. Instead, it has the right-click which work similarly.
Installing applications from the internet can be daunting for first-time Mac users. Don't worry though, it isn't as complicated as it may seem at first sight.
If you keep your Mac in a public place like an office or a university, you should definitely add a password to your screensaver. It only takes a minute!
FTP is a popular way of sending large files over the internet, used by designers, publishers and other professionals. There are many great FTP clients for the Mac.