Hello,
I just read your task details and I am sure that I can do the mentioned things in your existing Wordpress website. Can restrict users to go back to the wp-admin page. Can remove the dummy data which comes with the theme. Can add Adsense. Can do other stuff on your website as well.
I am a freelancer having experience of more than 3 years in developing awesome websites using HTML5, CSS3, Bootstrap, JS, Jquery, Wordpress, and Joomla.
You can check my website for my portfolio: [login to view URL]
Please contact me so we can discuss things and can get started.
Thanks
Best Regards
Jawwad Rizwan