I want the users to register and submit the manuscript to journal without getting access to the dashboard. Like direct submission on the website using ojs submission system.
The same interface should be on website rather than user dashboard.
Any idea to achieve this.
I am not sure why this would be desirable: the dashboard is the entry point to the entire review system and is performing quite well for this purpose. If you still require your users to register, why not use the dashboard? If your concern is purely graphical, it is possible to edit the backend design accordingly (Theming the Editorial Backend), although you should exercise caution in doing so.