I worked in grocery @ghostrek.
I can tell you, you don't have to have any experience. If you're looking for something different that is.
You can learn all the in's and out's, and possible move up in no time.
I started as a stocker, and got promoted to assistant grocery manager within 6 months.
Left that store and went to another one, and was making really good money. So much so, that when I threatened to quit, I got a raise to stay.
Eventually, I was the night manager. Didn't take long.
It's not really hard, if you can get on in a good store. Then you will learn a new trade, and can take that with you to any grocery store.
That's all I can contribute here. I only know grocery, taxes and paint and body. Grocery would be the best bet from those three.