A minimum of 4-5 hours of sun daily. It’ll grow in the shade also but will look leggy & won’t flower. This would have no appeal. Part sun will do as long as it’s nice & bright. On the coast it can take full sun. If inland, it needs protection from the hot sun or it’ll burn (not to mention the fact you’ll need to give it more water).
If you’re in a colder coastal zone, you might consider planting it in front of south or west facing wall to give the vine additional warmth.
Watering always depends on your climate, humidity & soil conditions. As a general rule, it needs to be watered regularly. It can go drier once established but will appreciate & look better if deeply watered every 2 weeks. During the colder months water your Pink Jasmine once you see the soil is drying out. Like all plants, it needs less water during this season & you want to avoid root rot (if your soil is drains well, then you have to worry about this less).
While your Jasmine is establishing, the 1st year or 2 after planting, you need to water it more often. This will promote a healthier root system that will make the plant more resistant in years to come.