Ask about the interview results. The personnel department said to call me back later.

When asked about the interview results, HR said that I was called back later because I had something to do, so I will call you back later.

Now that you have an interview, he asked you to wait for the phone call at home, so you have to wait quietly. In the meantime, you should actually calm down and wait, because when they inform you, you may have passed the interview. If they don't inform you, it may mean that you have failed, so don't expect anything. You should interview for your next job.