A short message is all you need to send. Andrea reads every inquiry personally and gets back to you as quickly as possible.
Send a short note, and Andrea will reply with availability for a discovery conversation. Before that call, she will share a brief pre-meeting questionnaire so the time together is well spent. The first conversation is a working session, not a sales pitch.
If you have something specific on your desk already, mention it in the message. The more context you can share now, the better the first call.