The reason I asked was because if your status was due to run out then it could affect the decision, so that’s not an issue.
Isn’t an A visa a diplomatic visa? I thought one couldn’t usually adjust status from a diplomat status, but I’m definitely not an expert on that and I presume you have investigated any relevant angles like that. So assuming you can -
The question of how long the process will be after your number is current is a “how long is a piece of string” type question if you are doing AOS. It could be quite quick or it could take months, depending on your FO, whether or not they batch DV cases, etc. it’s not like CP where you (generally) get your interview in the month you’re current and assuming no complications,should have your visa back in around a week. As mom suggested, take a look at the pros and cons of AOS vs CP in the spreadsheet to help you decide what is best in your own situation.