I've owned a 600d, a 60d and now have a GH2 and a GH4. The 600d (t3i I think) was a great starter camera and taught me so much about dslr video and photography. I am heavily invested in the m4/3 system but with all of the adapters available I wish id kept my canon glass.
Like many people have said already, if I was you I'd buy a t3i or equivalent with a nifty fifty and use that to learn. Then invest in the best glass you can afford, or save up for it.