ARK1 does not have large requirements in terms of learning how to use software, mostly there are some introductions to graphical software and some very simple workflows that are used in specific assignments.
By the end of the semester, you should have tried the graphical tools used in the study, like Photoshop, Illustrator and InDesign, from ARK3 onwards, everyone expects you to handle all the workflows associated with these programs. This does not mean that you need to be an expert, but know the normal worksflows associated with architectural student work, such as fixing up drawings and renders, putting together a layout and making some digital illustrations.
There are not a lot of requirements to workflows at this stage, but you should be able to open Photoshop, Illustrator and InDesign (or their Open Source equivalents) and use them in a simple manner to solve tasks during the course.
There are some basics you need to learn, some to manage your way in the school network, others to develop good working habits straight from the start. Before starting out, you should read all the articles in the Computer Guide menu - there is a lot of help there.
If you feel like these things are easy and you are already proficient graphical work, feel free to explore the more advanced sides of the Graphical tools or try looking at 3D - SketchUp is a good place to start.