Hello, are you sure that the startup disk isn’t full? Check the drive information to be sure and do a restart or two, it may fix the problem by itself. There is also a thing when the message archive is clogged with photos and videos and the system shows you that, so fully deleting them should help you. If you don’t know how it’s done, check this article osxtips.net/how-to-delete-all-messages-on-mac/
You don’t need to dig into it yourself, you can take it to the workshop to a person who will help you with this. Updates can only make things worse, as in my case. But I had another problem and it was that at the time when to replace your macbook pro battery, I didn’t understand it and thought that my laptop just turned off and stopped working. I did a factory reset myself, but it didn’t help, since the problem was completely different. So do not experiment and deal with the problem with the wizard, just try https://breakfixnow.com.sg/macbook-blue-screen-of-death/