Drosophila's writing is no problem! There is no need for proofreading. I can see you are comfortable at writing. Since on this topic, I want to share one experience of mine in learning English.
I still remember when I was in one English speaking class. When the teacher broke up the class into groups and encouraged everyone to talk to each other. Everybody quickly turned into nonstop speaking mode, except myself. I could not utter a word although I was very good at all my grammar lessons. Now looking back, I blame on the lack of practice of mine. So I don’t blame dontcry for saying mistakes will lead to another mistake if you don’t practice to a right person. But I don’t agree with dontcry who sees communicating with the “same” one is a useless strategy. I admired my friends who seemed very fluent although it was possible that he was only speaking “junk”. But as Drosophila said, what most important is the motivation and attitude toward learning English. Without this, you will fail.
About motivation, I also have another story. I started seriously thinking about learning spoken English when I was about 20. I went through months of futile effort without obvious progress to boot up my morale. Instead of quitting, I did some research to find out why my progress in speaking was so slow. One discouraging finding was that some people think when you pass age 12 or 13, your ability to learn a foreign language becomes much more difficult, if not impossible. This news made my heart fell. Luckily, I did not quit; instead, my stubborness forced me to search for more information on the subject. What I found out would be a good news for a lot of you who are struggling with your own learning. There are numerous authors who believe that the ability of a person in late-teen to learn speaking a foreign language AS A NATIVE SPEAKER does diminish, but this does not mean that that person cannot make himself or herself understood. Of course, you don’t want to be a native speaker, you only want to make your message/idea across understood by the next person. With constant practice on pronunciation, a person can always improve their speech and make themselves understandable. If you pass the point that you think your accent is a problem, you will be successful in speaking. I once thought my accent was so terrible that I could not open my mouth. If I could not open my mouth how can I have a chance to practice? Furthermore, sensible people always ignore your accent problem and what they only want to get is the message you want to convey. And a bonus point is, most civilized foreigners think accent is something very interesting and cultural and fun to have, given it is not too distracted to become an obstacle of a dialog. Some people think that if everyone speaking with the same accent the world becomes a very boring place.
So next time, if you think your English will be your key of success, don’t be afraid of open your mouth and practice. The key is not at your accent but at speaking clearly.