Ok budgies do not need to drink as often as we do , they usually will only drink after their first eating session on waking and perhaps a little sip every now and then. they need the water to be room temperature they don't like water that is too cold.
If your budgie drinking a lot then it is a sign of sickness in fact.
They also need a good amount of sleep, a uninterrupted night time sleep is essential for their wellbeing and health. Budgies do not have good night sight so the tend to start settling once the sun has gone down in the wild.