I don't really think that having a correspondence with a penpal will help you to learn Russian fast. If you are not willing to pay for intensive training (which I can relate to
), your best bet would be to:
a) obtain a good Russian textbook or enroll in a free online course (I am sure there must be some), and
b) whenever you have a specific question regarding Russian grammar or something related to Russian language, come here and ask away
. There is no need to feel embarrassed about asking too many questions. This forum would die without people asking questions, so ask as often as you need or want
You may also want to consider making friends with Russians in your area, so that they can correct your pronunciation.