From what I know people get a decent score with 2-3 months full time preparation, take this into consideration and plan for yourself according to how much time you can devote in a week and then set your exam date accordingly.
for eg- if you plan to study dental decks part ii and mosby book part ii............see how much time it takes you to get through a certain number of decks lets say 2 hrs for 25..........then count how many total you have to go through lets say 100 so you basically need 4hrs for 100 decks.
this will give you a rough idea of how soon you will be able to read all your decks, do the same for mosby or any other material you want to read before exam.......also, always keep 1 week over the time required which is a buffer time, in case you miss your schedule a bit.
Since you're working full time you really have to break it down to progress per hour and stick to it.
As for a recommendation to set your exam, you really have to calculate it on your own as your circumstances will be different from someone else's , also reading speed etc.......so take a pen and paper and try the above method it might work for you.
and don't worry you will make it, it takes time but you will get there 🙂
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