In an istore implementation project first we need to install the mandatory dependencies to Oracle iStore, once complete we can begin setting up sites.
The steps required are:
1. Set up the Site Administration UI.
2. Create a basic site.
3. Set up the Customer UI.
4. Test the site.
In addition to the required setup steps, we can customize and add functionality as  desired by performing advanced setup tasks and by implementing other Oracle Applications modules that are optional integrations for Oracle iStore.