The interview atmosphere was pleasant, and the topics discussed were appropriate without being awkward. They clearly explained that it is a project-based contracting company, so it likely has the issues that such companies typically have. Also, since I was a newcomer, they did not ask any difficult technical questions. If I am not notified, I may interview there again after my technical skills have improved sufficiently.
It may have been because of the pandemic, but when I first entered the office, there was practically no one there, so I thought it was a shell company...