Jinrui zoekt: Een Kamer / Huurwoning / Studio / Appartement in Leiden

I am a 28-year-old Chinese male who is about to study the master's program in Statistics and Data Science at Leiden University on September the 1st.
Recently I lived on my own for half a year, during which I cooked myself ratatouille, beef stew, steamed whole grains, stir-fried vegetables, and other simple dishes. After every meal, I wash the dishes and wipe the stovetop and the wall behind it. I have a vacuum cleaner and I vacuumed the room weekly. I used to love singing but vocal exercises have been a low priority in my life for a long time.
I had lived with my classmates, shared house with complete strangers, lived on my own in different apartments in different cities. Now I need a place where I can live and register my address after I arrive at Leiden.
Sleep is important. My regular sleep time is from 0:00 to 8 or 9 a.m. And I try to avoid people who smoke cigarettes.