After you create a site, you should then see the Documents Library tab appear. If you do not, click on the More button in the upper right hand corner and select customize site, inside there just click on add pages and add the Document Library page to make it visible. This is also the area you can delete things so they do not show up on your page/site. Hope this helps!
Is there any way to view/linkup documents uploaded from alfresco explorer and share application. And also the users created from the Alfresco explorer, will they be able to access share applicaton?