The goal of texting early on is simple: build enough comfort to meet in person. You don't need to be brilliant, only easy to reply to.
Reference something real
Use a detail from your conversation or her profile. "How did the half marathon go?" beats "hey" because it shows you remember her.
Make it easy to answer
Open questions with a light tone work best. "Settle this: is cereal a soup?" is silly, but it is simple to respond to.
Match her energy
If she writes two lines, don't send eight. If replies come hours apart, you can take your time too. Pay attention to the rhythm rather than counting minutes.
Know when to stop
If you have sent two messages with no reply, leave it. Silence is an answer, and more messages won't change it.
Suggest a plan
Once it's going well, move forward: "This is fun. Want to continue it over tacos on Saturday?"