So, I answered the first queestion on my own: you can press 'e' from the boot menu
It seems that during installation, the swap partition was detected, but instead of being used as swap it was used for hybernation (the resume parameter).
Since I cannot look at the help center, can anyone suggest a stable fix?
My idea was to create a new swap partition, replace it in /etc/kernel/cmdline.d/resume.conf, where I believe the clr-boot-manager looks, and then? What's the command for updating the boot manager?
Any obvious issues with the solution?