Many thanks
SketchUp
Yes, something à la Windows To Go to intall SketchUp and also MockupsForDesktop as I’m obligated to send my homeworks back in their proprietary formats to teachers
I have the iso and a key for Enterprise (WTG is only on Education and Enterprise)
No Windows PC here
This part ? (to be sure)
If you are on Linux 
Download the ISO image of the distribution you want to install copy the path to your downloaded ISO file. 
Open a terminal and execute sudo apt install -y rhash. 
Execute the following in a terminal: rhash --sha512 /path/to/file, replacing /path/to/file  with the path you copied in step 1. 
Check if the hash output is the same as provided on the distribution’s website. 
Burn the ISO image, as described here  . 
Once it is burned, check the hash of the CD itself, as described in step 3, but this time replacing /path/to/file  with the path to the actual CD. 
If the hash is again the same, then retry the installation, once again. If not, repeat all above steps.