My eyes are much worse than yours, OP, -3.25 and -6, and I also have astigmatism in both eyes. I've never had a problem with my contacts. The trial is freaky (it's probably the first time you'll voluntarily touch your eyeball, and your eyelids will do what they can to stop you) but after a day or two you'll forget you're wearing them. I've accidentally written pairs off by sleeping with them in before, they're so comfortable.
Oh, and as someone who can't remember having 20/20 vision, showering with perfect sight is _trippy_.