Would be neat if you could make a signature below your postings with a timeline but I haven't seen that here yet, could be mistaken though.
I'm about a month ahead of you. I finished my exams on the 6th of this month with a sleep study. I've confirmed with VES (my appointed contractor with the VA for my studies, you may be using someone else) that all of my exam data has been routed to the VA. I am unclear on whether or not my NMA is complete. My OIC says it's done, my SSgt says it isn't and it's being worked on. Gonna hammer out those questions here sooner than later, can't move until my NARSUM is ready and it isn't ready yet anyways.
I was quoted 3 months after that goes down, but you know how it is. The likelihood of everything happening as it's stated is slim to none, so be ready for that. Verify you agree with your NMA, your personal statement has a proper rebuttal to any issue with the NMA if there is one, and verify your ducks are in a row to get out.
If you haven't completed TRS, get on that immediately. It's a fiasco best handled without the presence of urgency. You should also apply for VR&E benefit while you're in so that you can capitalize on the entitlement to that benefit if you're planning on doing college. You would be potentially risking over 40 months of employability benefit (to include education up to the point of satisfactory gainful employment) by not applying. You can always apply after, but the scrutiny will be much greater as you will potentially no longer rate the benefit. You will always rate the benefit on a medical separation assuming the lack of administrative separation running at the same time.
Sadly there's no realistic answer to be given to you. You can look at recent timelines but results WILL vary. You don't even know what findings were conclusive and if you disagree with a severity level for any given disability.
If it hasn't sunken in yet, you need to be making your post military thoughts your number one priority, sharing that spot with staying out of trouble in the Marines.