I've never really used Canon cameras, but I've had a few friends who bought Canon entry level DSLR cameras. From what I've heard from most people Canons are a great entry level camera to start filming and photography with.
I haven't used DSLR cameras in a while, but I've found 50mm lenses are a great lens to do talking head video with as it allows you to use depth of field. I'd also look for something under 18mm. Zoom lenses are good, but I've always heard "prime" lenses are better than zoom lenses because they focus all on optics because they don't have to focus as much on zoom mechanics. I'd personally be eying off a 50mm prime lens at something like f1.2 but some lenses can be a lot more expensive than others.
There used to be a camera guy I followed called "Ken Rockwell" who did reviews on lenses. But these days you could just as easily jump onto youtube, and do a search for "Best canon dslr lens" or "best budget dslr lense" and with a youtube video review, they will USUALLY (if it's a good review) have actual real world footage of the lens in use so you've got a better idea if you like the look of the image the lense provides.
The best thing about DSLR cameras though, is you have such a wide range of options for lenses, and you can also use old second hand or even more vintage classic lenses.
