I started as a colleague, and was multi skilled pretty quickly by my managers. I did a lot of overtime, and the main reason I was considered for promotion was that I took control of a situation when the cover manager running the store was struggling to deal with it. I was promoted two months into working for sainsburys. I did my interview with another store manager in the area cluster, which was pretty straightforward and (without giving too much away) focusses on attitude towards people and the base management behaviours and initiative. I stepped up to full time when I was promoted, as I had the time to do so, on the understanding I'd he transferring stores upon my return to uni. I was lucky that my manager was completely fine with this. I completed 4 weeks of pre appointment training, where you should cover: cash office and handling, scheduling and pay management, running a store, safe and legal processes, housekeeping, and a few other bits. Let me know if you have any other questions.