Hello Emilywoo and welcome to Wikipedia! I'm AndrewvdBK, one of the many editors of this great website. I've posted this just to give you some useful advice and help you to settle in. You'll find that Wikipedia is much more than just articles and that there are many areas in which you can help out.
If you want to create an article, I would suggest using the Article Wizard. It will guide you through what you should do to write a great first article. To learn more about editing articles, this page will tell you all you need to know.
To learn more about the fundamental principles by which Wikipedia operates, read about the 5 Pillars of Wikipedia. They should help you to understand exactly what the website stands for.
You may not want to jump straight into editing and writing articles, which is perfectly understandable. The Sandbox is available for anyone to experiment in. You can even create your own sandbox if you wish.
If you want, you can upload images to Wikipedia. However, you will have to know about the image use policy if you are going to upload images. This is largely due to copyright issues, which Wikipedia takes very seriously.
It is important to be civil at all times and to respect the views of other users. Etiquette is a fundamental part of Wikipedia. Remember, the success of Wikipedia is down to teamwork and cooperation.
Eventually, you'll understand why these cookies are here
I hope you enjoy your time on Wikipedia - it can seem very confusing at times, but you'll find that most people are more than willing to help you if you need it. The longer you spend on Wikipedia, the more you'll learn about how it works. If you do need help, you can contact me by leaving a note on my talk page and I'll get back to you as soon as I can. Alternatively, you can add the code {{helpme}} to your user page and someone will come along to offer you assistance.
One last thing - remember to sign all your posts by typing 4 tildes (~~~~). This automatically inserts your username and the time and date of the post.