They definitely offer part time, I can confirm that, and if you're doing a cadetship they have someone who's there to help you manage your timetable around work and what not just in case you have any issues.
There's definitely a lot to take away from the application process, it'll make your next one a whole lot easier. Also realistically its hard to know if you DEFINITELY want to do it because you haven't ever done it, but I read into it and did the research, I found it interesting, I knew I wanted to do Commerce so thats how I approached it.