nao entendo pq nunca consigo | Angular: explorando o framework

eu peguei o projeto daqui https://cursos.alura.com.br/course/angular-comecando-framework/task/86826 e mesmo assim executo normalmente e da esse erro. ja esta instalado na minha maquina o angular

C:\Users\Rubinho>cd Desktop

C:\Users\Rubinho\Desktop>cd angular

C:\Users\Rubinho\Desktop\angular>ng serve The serve command requires to be run in an Angular project, but a project definition could not be found.

C:\Users\Rubinho\Desktop\angular>cd angular

C:\Users\Rubinho\Desktop\angular\angular>ng serve An unhandled exception occurred: Cannot find module '@angular-devkit/build-angular/package.json' Require stack:

C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\node_modules@angular-devkit\architect\node\node-modules-architect-host.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\node_modules@angular-devkit\architect\node\index.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\models\architect-command.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\commands\serve-impl.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\node_modules@angular-devkit\schematics\tools\export-ref.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\node_modules@angular-devkit\schematics\tools\index.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\utilities\json-schema.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\models\command-runner.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\lib\cli\index.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\lib\init.js
C:\Users\Rubinho\AppData\Roaming\npm\node_modules@angular\cli\bin\ng See "C:\Users\Rubinho\AppData\Local\Temp\ng-R4AxQ8\angular-errors.log" for further details.

C:\Users\Rubinho\Desktop\angular\angular>