Hi welcome !
The best tip here is reading. Reading stories to get what should be expected when writing one. Reading forum posts here and there to get how the community is and how to interact properly. Reading articles in the help section to get how the website works. Good luck. :)
Also if you you're learning English, what is your native language ?
You'll do fine on the forum as long as you aren't a spastic ten year old spammer or a creepy fetish writer.