I'm a lefty shooter and I have no problems shooting my slabside or my A2-type rifles.
With my slabside, I get nicked by brass about once every thirty or forty rounds. No big deal; I don't have to stop shooting to get a BandAid! Never hit me above the cheekbone.
An unanticipated benefit of the slabside is that without the case deflector, all my brass lands right over my shoulder in a pile. I don't need to go chasing it or use a screen to keep it from hitting my neighbor, as I do with the A2.
With a modern A2-type rifle, I'd say it's nearly impossible to get hit with your own brass- so don't worry about that. Unless you are specifically looking for an old slabside (no case deflector or assist) or an A1 (no case deflector), you will have no problems at all.
The only possible warning I would have for you is, if you don't wear glasses anyhow, you should be wearing shooting glasses when shooting. But that's what the rule book says about anyone target shooting or hunting in the first place. Just makes sense. After all, when you're in a line of rifle shooters, it's not just your own brass that's flying around.
Good shooting.