Hello, probably very scary to leave the house unattended, especially for the first time. You are lucky that you do not have a pet, you would have died of fear altogether, lol. I would advise you to ask your neighbors, if you are on good terms with them, look after the apartment, water the flowers, and so on. If there are no such neighbors, you can set the alarm. In extreme cases, you can buy a microphone and make an online broadcast of everything that happens in the house. You can control the situation and at any strange noise call the police at your address. Only you need to buy a very good microphone that can work at any frequency and perceive the quietest rustles. Look at this article, it tells about the best microphones
https://bestazy.com/best-wireless-microphone/. Maybe something will suit you. If you are super rich, you can hire a security patrol who will monitor your home until you are gone, but I think the audio (video) broadcast or alarm is better.