I can give a vouch if you want!!
Not eligibleNeed a vouch. Can provide you with udemy rippers coded if you need it.
Not eligibleGive me a chance, I want to vouch for your sale. 
I'll give a detailed instruction after receiving and testing your vouched copy.
Waiting for your reply.
Not eligible I'll give a detailed instruction after receiving and testing your vouched copy.Waiting for your reply.
But you can get course demo for free
Just let me know which section of the course you want to acccess.
https://www.udemy.com/android-tutorial-from-beginner-to-professional/ Has total of 89 Lecture choose one and will give a free trial to it.
Yes, you can choose from any course given above.