Your best bet is to install Virtualbox, then download and import the Vision Demo 12.2.4 VM Virtual Appliance - https://blogs.oracle.com/stevenChan/entry/e_business_suite_12_2
Google for my blog for detailed installation steps. If you are new to EBS, this is a steep learning curve.
Thanks for reply, but I can't install Virtualbox on my office computer because it not permissible in office.
I am accessing oracle application R12 instance using below link, do we have any online link to access database in same way?