Yeah, I've seen a video on someone practicing on an orange and it seemed to work well. A tomato seems like it would be too soft, but I guess we'll see!
The doctor compared giving an injection to throwing a dart - that you're supposed to pull back then jab it in all the way - and that makes me a bit more terrified. He said, though, if neither of us is ready to do his next shot (next Saturday) that we can come into the office and he'll work with us again.
As for injection site, it seems like most guys do in it the thigh or butt. Alex's first shot was in the upper arm/shoulder, which seemed a bit odd to me since I'd never heard someone mention that as a possible site before. All kinds of new things to learn!