I know waiting is impossibly hard, BUT it does not matter if you get selected in the first wave or the very last wave - either way you are a cadet just the same as the cadet next to you. Please don't worry about first wave so much. First wave is only approximately 1/3 of all of the offers that will go out.
First wave will be made up of a mix that NO ONE can definitively tell you. It can be principal nominees who have their file completed, clear slate winners where it will not matter what else the other candidates submit in the next week (think less competitive districts where they don't even usually fill the slate), LOA recipients that didn't have their file complete super early, etc. etc. etc.
You could get passed up in the first wave because someone else on your slate gets a higher WCS than you but get in on a later wave because they declined the appointment or West Point found another way to get you in. Being in the first wave does not make you more qualified to succeed than any other cadet. If anything it gives you more time to worry about the packing lists and getting the right color underwear, correct shoes, etc. And that is not a blessing either.
My advice - watch for the first wave to come out. The first few days of them will be people who were called by their MOC (not everyone will get this call), the weekend wave will either be people who live close to New York and got their BFE in the mail or ones who obsessively check their portal and found out when it changed, the next week ones can either be got their BFE early the next week or are part of the next week congressman calls.
The important thing about the first wave as that you know they have started. They will send out acceptance letters every week after the first week and you will have no clue which way you will find out or when you will find out. Try your best to be patient until the BFE to TWE show up and know that either way you are highly qualified to even make this far and life is not over. I have heard that nearly 1/3 of most incoming classes are not direct appointments. If this is what you really want and you don't get in - there is always next year.