How to find a good FT Nanny

My wife and I just had our baby this March. I am trying to look for a good nanny beyond the basic ‘maid’ who looks after kids. I have found some but am struggling to find one that we are comfortable with and is to the requirements we have (educationally, responsibility etc).

We are looking for a full time live in nanny who will travel with us. Can anyone advise how they found their Nanny and if you could advise on the best approach? I know the standard answer is agencies but it is really difficult with the sheer amount of agencies online with very few ways to know if they are good or reliable. I would also appreciate if any of you could advise us on the common pitfalls or tips we need as we start the search process.

Also- what would you advise us as a salary range to expect? We will cover all their expenses while living with us and are planning to offer 4 weeks of vacation per year, with flights etc included as well.