I took my diagnostic (Never checking out the LSAT before! Also, I took the sections right next to each other, no breaks between and within 35-36 minutes each section.) and I received a 149. I intend to take the October class and given my game plan, any advice if this 170+ goal is achievable?
I sort of addressed this in a reply to another of your posts, so forgive me for being repetitive. Is it achievable? The answer is yes, but it's statistically unlikely. Only a tiny fraction of those who initially score 149 on the diagnostic score 170 on the actual LSAT. I know we all like to think that statistical probabilities don't apply to us and that we'll be the exception, but that's the reality.
I would advise making a back up plan, and think about what you're going to do just in case you don't score 170.
Also, I do a lot of community volunteer work (I act as a Team Leader in numerous civic projects here in NYC!) and I was hoping to get some scholarship in the top 14.
The competition to get admitted to T14s, let alone to get scholarships from T14s, is very, very stiff. Those schools are flooded with applicants who have high GPAs, high LSATs, and amazing soft factors. Right now, all wishful thinking aside, you have a 3.2 GPA and 149 LSAT diagnostic. I'm not trying to be critical or negative, but those usually aren't T14 numbers.
For the purposes of T14 admissions, a 3.2 GPA is low. The only way to really counter that is to score very high on the LSAT. Even then, admission is by not guaranteed.
The fact that you have a couple of M.A.s and do community work is great, but it won't really replace your GPA or LSAT score. Numbers dominate the process, and top schools have so many well qualified applicants that there isn't really any incentive to take someone with less than equal numeric qualifications.
As I said before, I would advise developing a Plan B.