When is the best time to take Ovulation Test?

Laura • A deaf Texan Mother to a six year old daughter, TTC for #2. Happily married for almost seven years.
Ok I bought two ovulation tests from Dollar Tree. When is the best time to take them? Morning or night? Should I drink a lot of water before taking it? I just drank coffee and is it ok to take one after I'm done drinking coffee? I've never taken these tests before.