Thank you
So, first we had to do an online application for the CRBA - which you need to get the passport. It's saveable so you can pause at places if you need to find the document to upload and/or need a bit more time for everything - but things you need for that are passports of both parents, proof of the US parent living in the us for more than 5 years (like their school transcripts) and proof of marriage/old divorces if its applicable. You also need to pay for this from a US registered card.
Then you book the interview which they say to give at least 5 working days for the CRBA information to go through.
We had her dad with us at the interview, which is preferred and honestly probably makes it easier because they asked him more questions than me, as he is the US parent, but you have any time up until baby is 18 to actually do it, they just prefer it to be as soon as you can.
At the embassy we went through security - which was just like an airport, then to the area where a lot of people were doing the same thing. They call you up to hand in all the paperwork and documents that are needed there.
In person for both parents it's passports and two photo copies of each, the birth certificate of the baby and two photo copies, a passport photo of the baby, a print out of the passport information for the baby (there is an online form but it's just fill it in and print it off), and then proof of the US parent being present and living in the US before the birth of the baby, again this things like school transcripts but the more you can provide the better.
You can also apply for a Social Security Number for the baby at the same time, and they ask if you want to do this, and if so there is another form you fill in and print off to take with you, and then hand that over with the rest of the documents you take.
They take all this and ask you to wait, and then you pay for the passport if you have not paid online for it already.
then you wait some more to be called into the actual interview - I don't know what your Embassy will be like, but we definitely had a bit of wait! We actually got there 30 minutes early for our appointment and we did not go in for the interview until at least an hour had gone by.
When we were called into the interview we were asked to swear that the information we were providing was true and accurate to the best of our knowledge and then they asked a few questions about where she was born, if my Fiancé was present at the birth, and then asked him so swear and sign a document that he would provide financial care of the baby until she reached the age of 18 - because we were not married at her birth. Then he was asked a lot of questions about his time in the US to establish that he was present there for enough time before her birth.
They will tell you in the interview if they will award the CRBA, Passport and SSN and give back the original documents.
If it's successful they then ask you to check the information and sign the passport form and the CRBA and then tell you the time it should take for it to arrive.
You then go and sort out postage if you have not got a prepaid envelope (my embassy prefers to use a dedicated delivery service so we just used them).
Then you are free to go!
My advice is, take as much information as possible, it's better to have too much than not enough.