Language acquisition is about consistent repetition, learning, practice and discovering where your limits are as well how to push beyond them!
Aside from the educational approach, I think you also have to take a philosophical approach too. For English native speakers, Hebrew is one of the hardest languages to learn.
Yes, I'm currently learning Hebrew myself and I don't expect to be fluent in 3 years, never mind 1!
You will make mistakes!
You will be frustrated at times!
But you WILL learn something too!
Becoming fluent in a language in a year? Not very realistic perhaps. Even if its not far off your native tongue.
Can you understand the grammatical basis to develop a foundation upon which to eventually become fluent in a year?
Yes, that's possible. Especially if you go to a school where you learn a language intensively for 3 months.
But you still have to exercise your skills consistently enough over time to become fluent.