Hi,
Simply follow the instructions on this guideline. However, if you are not an expert, this installation is not recommended instead you should try to deploy your Aggregate on Google Appengine. If you get stuck at any point, you can come back for help at any time.
Welcome to the ODK forum, @osama1! We're glad you're here. When you get a chance, please Introduce yourself here!. I'd also encourage you to add a real picture as your avatar because it helps build community!
Thanks,
Imran