I don't like talking about ''impossible'' things. But, in my opinion, (and I'm not joking at all) this can be possible in case you have the ability to go out of your body and travel the astral dimension for fast knowledge. Some people do, but honestly I still don't have the experience.
Otherwise, if we talk about physical world, your expectations are not realistic, I'm afraid :) In my experience, and studying hours every day, you would need at least two or three years to start speaking fluently with still many mistakes and an imperfect Spanish. Maybe one year if you live in Spain or Latinamerica and speak every day. And for a native level achieving maybe 10 years if you study in a consistent way :)
But as Sergio said, it depends on the time and practice you spend and on your ability to master languages, of course.