Many times this is equivalent to a simple understanding. When the weather is good, people's mood will not be too bad. After meeting many times, you can praise her for wearing beautiful clothes today, looking energetic today, looking good today, and so on. Everyone likes to listen to the so-called people who don't laugh, but they are not too hypocritical, too sweet and too fake.
Don't be nervous. Timidity is a taboo for men. No woman likes timid men. Just like making friends.