I'm glad to hear you're alright and that you're still on track.
I know how it feels when people say something like "Be yourself" and I feel like I'm a trainwreck and that has never been enough. But, in a way, people don't expect anything of someone they've just met. It's a blank slate. If you try to be anyone else, it will show in the long run. Treat her like a colleague, not someone you have a crush on. She's just a person, with interests, hobbies, a life, ask her about those. Get to know who she is as an individual, instead of overthinking anything else that could/might ever happen. A way in to talk to someone you barely know is just to start the conversation about work, part of what you both do on a daily basis. The common denominator. Maybe a joke about how tedious some task is. That's a way in to a more elaborate chat about things outside of work. Sounds patronising for me to even write this, I do apologise. But, having been someone who's extremely shy (still am), have social anxiety and have to think about EVERYTHING I say and it cause stress before a conversation and for days after, I have to think about how to make social interactions on a daily basis. I always think - "How do normal people do it?" I still haven't mastered it at all. But at least I can somehow hold a conversation with people now. Or even start one instead of hiding away in a corner trying to be invisible. Granted it is harder when you seem to be developing an attraction to someone because there is that additional stress of trying to make an impression. But, a smile and a joke go a long way. Nothing special, just being friendly. And I do admit, it's probably easier for a female to pull this off, a guy has to be more subtle.
tl;dr - I think what I'm trying to say is, don't overthink it and don't rush things. Take it one day at a time, try to have small casual chats about work - which would hopefully evolve over time into something about life and general interests. Think a bit about your body language - it says a lot more than words ever could.
And I truly apologise for going off on a tangent here! Feel free to disregard everything I said (yes I'm thinking about deleting a chunk of it D: ).