How do I come back to my purple-orange color desktop, with the cat picture on the surface?

Question

After password for disc encryption, I get a black window. With CTRL+ALT+F2 I were asked to login and password. Than I got a „Welcome to Ubuntu 20.04.2 LTS (GNU/Linux 5.13.0-41-generic x86_64). The command line shows the name and than :~$ and than the blinking line. How do I come now back to my purple-orange color desktop, with the cat picture on the surface?