This is where you will need to appear most confident, lead but also don't put out the needy vibe. You need to receive clear IOIs back to ascertain where you stand with her but it's early days so just ask her when you can spend more time with her. You will do best in person. Texting and messaging only serves to confuse interactions since everyone has different filters and can take something the wrong way (there's no tone or body language in a message!)
Ask her out in a couple of days time... this will build anticipation, show you're thinking of her and show her you mean business.
Let us know how you get on.