wow you got 750-800 out of 6 months in credit history? D:
Best advice to you is to pay off everything before purchasing. Credit utilization of 0% helps greatly as it looks like you'll have nothing to pay off and you can have all the money for the car. With a credit score like that I'm sure you'll be fine. You won't have a super low apr since your history is new but you'll be able to get financed easily. Especially with 5k down. You should look at around $400 a month depending on what trim you get.
First time car buyer will make it harder as well. If you can, get a co signer. Makes everything 5x easier.
I don't think theres anymore Series blue. I was looking for one before I bought my BRZ and they said each dealer only gets about 4. Once they sell out, they're out for good.
I also don't think they'll make a 2016 release of it again

Makes me sad since I love the seats and wanted to make my BRZ look exactly like that since they first released. Oh wells.
P.s. Use truecar.com to try and get a good deal from dealers around you. I forgot to use it so i skimped on some money :/