How do I do these? If I can't fix these, my game is done.

How do I do these 2 things:
8747790--1184961--upload_2023-1-21_18-16-7.png

8747790--1184973--upload_2023-1-21_18-18-20.png
Please help me! If I can’t fix these, my game is done…

Do you not understand what the popup is asking you to do?

The error messages are telling you what to do quite explicitly: install the JDK (java development kit) if you haven’t yet and configure the path to it under “Unity Preferences->External Tools”.