For anybody who wants help installing Debian during my visit, we can look at it together during the Debian meeting tonight or maybe another time over the next few days.
To be prepared:
think about how you want to backup existing data, maybe you will need to bring an external HDD and it could take an hour or more for the copying
if you want to run two operating systems and you need to shrink the disk partition for the other operating system before you start the Debian install, that can take a long time (maybe hours) and you may need to do that before we run the Debian installation itself
If you are not sure about these topics, we can still talk about it at the Debian meeting and you could do these long-running tasks on another day at the hackerspace if we start early.