They're good cameras but usually more expensive -- why restrict yourself to Canon ?
As for choosing one -- you should first work out budget, whether you are serious or just point and shoot etc, etc.
If you are a complete beginner, start with a secondhand point and shoot until you have more idea what you need.
Although I previously used Canon professional and vintage rangefinder 35mm cameras, my first digitals were gifts from friends who were upgrading. After about five of those I have a better idea of what to buy, when I get round to it.