If this is your first contest, I think 8 weeks is a bit ambitious like BONEZ said, especially if this is a natural show. 13 weeks is much more realistic and you could definitely do well if you peak at the right time.
But if you really want to do well, you need to change your attitude from "I think I'd like to do a show" to "I'm doing a show."
You should really get some help with your posing as well. Right now you are holding your elbows too low on both of your double bi poses (this makes the lats and delts look tiny), you're not drawing in your midsection enough, you're not puffing your chest up/out enough, you aren't smashing your legs together on your side poses, you're not flaring your elbows enough on your front/rear lat poses, you're not turning your upper torso on your side poses, and you need to bend your knees and flex those legs a lot harder/figure out some better foot placement. There are other tweaks I would make, but those are the major ones that I noticed.
With proper posing, your physique will instantly look A LOT better.
I highly recommend hiring someone who has won multiple shows to take your through the mandatory poses. They will also teach you how to go through quarter turns so you don't shuffle your feet around and look like it's your first show. They should also teach you proper breathing so your body isn't shaking while the judges make you sit in your poses for 30 straight seconds.
All that said, your physique IS great and I think it's pretty balanced. It's just that tons of people have great physiques yet they don't know how to show them off properly. I think if you get that help, you won't just be in a competition, you will do exceptionally well.