I hope you do enter it. if you would like me to either find a challenge buddy or a critique group let me know (you can send me a PM with your info, you just need to click on my name above the avatar and it should take you to the page where you can PM me.
Also, I'd really encourage you to read some of the entries in the level you would be submitting at. Leaving feedback is a great way to figure out what you like or what you think doesn't work, and then you can apply that to your own writing.
One thing many newbies make the mistake of when they first enter is not hitting the preview button before submit. This will show you what your article will look like to the readers. I generally end up finding several things each time that needs to be polished up. Probably the most common thing people do is not allow enough white space. In such a limited word count, and the fact that it is being read online makes it important to have several smaller paragraphs and to double space between them so as to not overwhelm the reader.
I wish you the best of luck. I think everyone here can relate to that scary feeling of knowing that you are sharing your most intimate thoughts with complete strangers, but oh, it's so worth it in the end!
Unlike many writer sites, you'll find people here are much kinder in leaving feedback. Sometimes too kind because if everyone tells me my story is wonderful, I'll never know the mistakes I make or how to correct them. If you do enter, know that 99.6% of the people here are coming from a place of love and a genuine desire to help others become the best writers possible. It may sting the first time you read a constructive comment, but try not to get defensive, remember it's just one person's opinion and give it time to let that sting heal and then go back and decide if you agree or not.
Once someone told me I started every paragraph with a name or pronoun. I remember rolling my eyes and thinking the dude exaggerated. Turns out, that almost every SENTENCE started that way. That was my first lesson in sentence structure and that dude is one of the people here who has helped me become a much better writer than I was three years ago.
So jump into the deep end and enter! We have several certified lifeguards around here who will pull you to safety if need be, with Jesus being the best lifeguard of all!