You start interviewing your candidates we delivered and decide 2-3 best ones to trial with (a typical trial will last a week, with each VA at a part time capacity).
*Note: The reason we recommend you trial 2-3 at the same time before you make your final decision to hire a winner is because you can never know how good a VA is until you put them in a real work setting and observe how they do with real work.
This way if you trial 2-3 at the same time, based on how the math works, you are almost guaranteed to be able to pick a top VA who will crush it for you.
Otherwise, you risk wasting a lot of time and money in the long run hiring someone that is not the best fit (mediocre and is not giving you the results you want).