Hi Alice, happy to help.
I would highly suggest to keep your personal belongings somewhere safe ideally not present when guest will be coming just so there is transparency between you and the guest terms of belongings.
I would for sure maintain the apartment so it's ready and clean for guest and assuming you already stay there you would supply the daily essentials to keep a guest going. Most importantly once you get bookings make sure you communicate with new guest on house rules, check-in times and any important information that would help them.
You should review if your current insurance property cover airbnb rentals or vacation rentals, if not may be worth to request a insurance that would cover it just to be on the safe side 🙂 hope this helps!