Understanding and grammar meaning behind "やったことないしなー"


I'm reading a Japanese manga and I found this "maybe" slang sentence. A female
character is asked to perform as actress in a school movie and her answer is:

> "えーー女優とか、やったことないしなー"

My guess is "An actress? I've never done it" but the grammar meaning looks
obscure. Maybe I'm wrong but two negations arise: "ない" and "しなー." I think it's
a contraction coming from "しない" or "しなかった". Probably some particles have been
omitted too.




しなー isn't a contracted negation. Rather, you have the [sentence ending
particle な](https://japanese.stackexchange.com/questions/33969/when-is-na-
used-at-the-end-of-a-sentence) preceded by し, which indicates a [partial list
of reasons](http://www.guidetojapanese.org/learn/complete/multiple_verbs).

Given the usage of the particles my understanding is as follows:

> Whaaat? But I haven't acted before (among other reasons).

Note that the な at the end of the sentence also indicates that she isn't super
confident in her ability either.

