How to I place the create form for content type on a page that can save the user's id?
First, to get rid of the "modal window", go to admin/modules and disable the Overlay module.

Second, if you want your logged in users to be able to create articles: 


Go to admin/people/permissions and scroll down to the Node section. 
There you will find different options to grant them Create, Edit, Delete, etc. permissions. For example, you can check Article: Create new content under the Authenticated User column to allow them to add new items in the Article content type.


Now your logged-in users can go to node/add/article page to find the form.