Here are the articles and courses for anyone who want to kickstart as an adroid developer. Happy learning:)
https://www.youtube.com/watch?v=AushtkE0FKM&list=PLlxmoA0rQ-LzrFmbcHy2vUYIr9ZRo83yv&index=1
https://abhiandroid.com/java/ (Useful java topics widely used in android development)
http://web.cse.ohio-state.edu/~champion.17/4471/JavaAndroidProgramming.pdf
https://www.vogella.com/tutorials/android.html
https://www.tutorialspoint.com/android/index.htm
https://www.udemy.com/course/complete-android-n-developer-course/
https://www.youtube.com/watch?v=7FOv6txKzMg&list=PLOWkC81NKMXOsBUkyQutW0cQOjjudcveE&index=1 (free course on youTube )
https://material.io/design/introduction/
https://developer.android.com/design
https://materialdesignkit.com/
https://www.youtube.com/watch?v=BEvOBTaYUm0&list=PLlxmoA0rQ-Lzd9-NUrP5Wi18OMi4R-zs_&index=1