I have been using Wikipedia since its inception and became a user back in 2008. I am able to help out in English, Polish or German. I usually browse Wikipedia about a topic I am interested in and if needed, I correct or improve its article when I have good sources.
I do not delete posts on my talk page, so you can check it out and learn from my experience. Don't get too disheartened if someone changes your edit or even deletes an article, they are human just like you. If the topic is truly important, make an argument and others will join you.