Just try and get your head around aperture, shutter speed and ISO – the three come together to give you your exposure. Then learn the 3 key semi-auto modes on the camera: P mode, Av mode (auto but adjust and priorities aperture) and Tv mode (auto but adjust and prioritise shutter). And it all starts to come together real quick after that.
Full auto should be avoided but P mode on the Canons is very useful giving full auto like functionality but with the option to override most settings. You can change ISO and alter aperture and shutter speed together with a wheel click, great for semi-creative pointing and shooting, there really is no reason to use full auto IMO.
Also, have a think about investing in an EF50 1.8. It’s the cheapest canon lens and while it feels restrictive having a non-zoom at first, the results are breath-taking for the money!