Please help : IoT Project using arduino and android over Internet

I would like to do some functions with my arduino and android over internet. I need your help and suggestions please.

My Project have four functions that will be done over internet :

1- Turn on\off lights. 2- Open\ close garage door. 4- measure the temperature and show it on the screen. 4- Detect motion and send an notification.

Also, my system is multi user system there is an admin and users with limited functions.

Please help my if my project feasible or not and how to make it. Any Kind of help will be appreciated.