I have tried to create a new SpringBoot Project by using the Spring Initializr. I choose Java version (language as well), Spring Boot version and all required dependencies. Download the zip file (and unzip it), and after that I ask IDE (I use Eclipse IDE) to import this project, but my IDE does not find the project file. Below I will attach image, perhaps it will help you. If you ever met this problem, share your knowledge please)
Can you check if Maven is installed and configured correctly on the installation path in the Window -> Preferences -> Maven -> Installations tab.
Also please try if you can import the project either as a Maven project:
If not please try to import the project as a file system as below and see if it succeeds,