cofisc I also use Zorin OS(Zorin OS 17.3 lite).
I've used gemini to make a script that let you choose between using the GPU, or use software to do the GPU's job. I find that using software creates less strain.
To check if it's hardware/software run:
inxi -G
software - you'll see llvmpipe
hardware - your GPU
Here's the script:https://drive.google.com/file/d/1ZQsaDhLvE7-RTEuj-MBFYlWr2RYQi7iM/view?usp=sharing
Again: i've created this with gemini. I don't understand linux that much, so it might have bugs.