Hi Adria,
I start clinicals in the Fall so I don't have any experience under my belt but I do know that when my aunt was in nursing school she practiced injections with an orange. She was allowed to take a needle home and practiced sticking our produce.
I have given injections to sheep when I worked on my universitys farm and I have to say that it really isn't all that bad or hard to do. While we didn't follow the type of "protocols" that nurses do I thought for sure I couldn't do it just because the thought that you are sticking someone else, but it wasn't that bad.
Plus, I figure if I can successfully do it while wrangling livestock hopefully I can do it with a person just sitting there