How can a blind date send a text message if she has never seen a friend?

Introduce yourself first, then ask the other person if they are free, and chat by SMS.

With the consent of the other party, you can talk about whatever you want, which is very casual.

Just pay attention to asking more open-ended questions and less closed-ended questions when chatting, such as asking the other person what kind of movies he likes, rather than just asking the other person if he likes watching movies.

Naturally, it will be easy to talk.

Finally, good luck.