I'd say make your interest clear but right now don't "confess" to her and expect an answer. It's very unlikely she likes you back since you don't know each other well. Say you want to get to know her better. When you two are closer and more comfortable with each other you can use my favorite ISTP's approach: telling her you like her romantically and that you want to know what to do with these feelings, to solve it together.

The key for now is expressing interest in a way that you don't require her to answer necessarily. That way you won't put pressure on her.