How do I upgrade to 6.4 without breaking my site and theme?

[ad_1]

Hello Everyone,
Im new to WordPress and am not used to the incompatable plugin environment. My site is currently on 6.3.2 (I had to roll back to this in order to prevent the white screen of death in the editor), but I would like to have the newer 6.4 functionality.

I am currently running the **Twenty Twenty-Three** theme, which seems to be lacking in mobile optimization etc.