Need to install a previous version of Premiere Pro & Audition

I'm new to using adobe so apologies for any misunderstandings.

My college course for digital post production focuses on using Premiere Pro (as well as Audition), so I signed up for the student discount. My issue however is looking for versions of Premiere Pro and Audition that are compatible with my computer. I'm currently using a Macbook Pro on Catalina 10.15.7. I've looked everywhere and I just can't seem to find any version to download the previous versions of Premiere Pro and Audition that are compatible with my computer.

If anyone can help me, it would be much appreiciated!!!!