I have been given a assignment to automate the last page
How can i automate just my page in this case
Well, from my experience, I think you have to launch app and then navigate to the view you want to automate.
You can try to launch activity directly with:
adb shell am start -n com.xxx/com.xxx.yyy.zzzActivity
But I doubt it will allow you, since its not a launcher activity.
There is another option.
You can create dummy activity, that prepares test data, mocks up all necessary components and then starts the target activity.
Though, you might find Espresso a better solution for your problem.
You can start the last activity as your launch activity by using the -LaunchActivity option while running your appium server
-LaunchActivity <Your app’s last activity>