Jumper pattern needed (shirt)

I bought this shirt at Lane Bryant. If you click on it, you can see that it’s not fabric but yarn based.


I must be “overconfident” in my knitting, lol, b/c I immediately thought…how hard could this be? I could so make this.

But, if there is a pattern for one, I’d really like to consult one first. So if you know of any let me know.