So I made another one for this because I'm new to this situation. I met her and got her number at the gym. I said

Hi. It's trpadvice1 from the gym.

Her reply: " Hey trpadvice1, I'm just getting to work so maybe I'll talk to you later ? "

I haven't said anything yet. What should i do?

"Sounds good " and wait? "Ok" and wait? Silence?

Thanks. Just trying to get better at this.