Preparing for Online triage appointment

I am in the process of seeking an autism assessment as an adult and was given a date for my online triage appointment today for this coming Monday.

While my brain is freaking out about an important thing at such short notice, I was wondering if anyone has any experience or advice for this initial appointment, especially for those conducted over video call. Any information that I should collect or anything that will be important to say in the appointment. 

Also, anyone who has an idea of how it's likely to be conducted. All I've been told is that it will be with 2 members of the clinical team and last about 60 minutes and discuss my needs and difficulties and I'm not good with the unknown.

Any advice or information is greatly appreciated.