It's simple.. Just find an entry point.. for instance.. What are you doing right now? What if she said she was reading.. Just ask her what book.. But this topic will not last long.. Now that you've cut in.. Then you can transfer.. You can immediately move to the relevant topic. Like what happened at school.. Then just plug in some jokes. Because I am humorous. That's how my GF was tricked.. Hee hee.. And.. The pace of phone calls is too fast.. There is not enough time for you to study what to say.. So SMS is still the best. Then be gentle.. Be enterprising.. It means that what you say is a little ambiguous. Make her feel you.. Not casually chatting.. Talk about ordinary things for a while.. You can care about her.. Ask if you slept well or something.. These are specific.. Don't say anything that will scare her at first.. That is to say, you like to be so explicit at the beginning..
It's best to first understand each other's hobbies, even birthdays (which can be related to constellations. Go to the Internet to see some constellations). If there is no topic, you can ask questions to find the topic you are good at playing. You can also discuss common things, such as the programs you have made an appointment to watch or the songs you enjoy, or even some recent news, Whether it's current affairs or gossip, it can be used to chat ~ ~ ~ it can also be used to talk about some small things around you. The key is not to be afraid of losing face, not to be afraid of embarrassment, and not to stop because you have nothing to say. If you can't go on, you can change it to make the other party feel sincere.
You are introverted and want to chat with others. Hehe, if you are your friend or the opposite sex you like, you don't need to deliberately find a topic, but you should answer beautifully when she / he needs you to answer. For your own words, you should also pay attention to your attitude and take it easy