my own advise would be to pay for some lessons, this way you will make best use of your time and learn the most. My own experience is that unless you are a teacher it is extremely difficult to teach grammer, most native speakers(non teachers/linguists) don't know the grammer of their own language, they know how to speak it properly, know what sounds correct but cannot explain it, I am the same, a child can speak perfectly well but couldn't tell you about grammer.
I am polish native speaker and I would like to practice my English. If you are interested to improve your polish please let me know and I will be delighted to help you. We can contact via mail and Skype.
My email: kolomik5@gmail
Hi, I'm very interested in learning Polish and I have MSN messenger so we can chat there.
I can help you with your English! I also know Spanish a bit......
If you're interested let me know here so I'll send you a PM with my messenger address.