i don't think you could learn any language almost fluently, especially not talking to anyone in that language. you think russians leanred russian in 5 months? we spoke russian for many years, many years practice, and you want to learn in 5 months. in 5 months you will speak russian on a level of a two year old.
i've learned english very slowly. and i'm still probably not very good at spoken english, especially a bunch of people speaking english, that's even harder to follow everyone
did you learn english in 5 moths too? you can't learn russian in 5 monthis just as i can't learn english in 5 months. i hope you understand what i said.