1. You will only be part-time. Even most managers are part-time.
You may or may not get a good amount of hours. This is strictly based on when you can work and how many hours you can work. If you have open availability AND you show up -on time- to your job sites you will get a lot more hours than those who don't.
2. You get raises based on your speed and accuracy. There are tricks to help improve that -especially when keying quantity - and unfortunately they don't really teach them to you. Talk to people who have been doing it for quite some time and they will teach you some of these tricks.
3. You will either work really early mornings, like 5am or late at night starting at around 6pm to 9pm until you finish the store.
4. You will drive to some locations only to work 2 or 3 hours. If you live close to the office like I did, then the stores are usually close by. If you don't and live in another city then you could drive for 45min to work for 2 hrs. So take that into consideration. You do not get paid for milage or the drive time to get there.