And how do I know the address where i want the reward? instead of stratum..
It's your wallet address. Not the address of the pool server. Have you created a wallet?
Yes i recently did at coinbase.com and the only info i have is a number similar to: 18RajJZbqArbC5n6d8Z6xxxxxxxx
Do i have to paste that as the address ? or how do i get the wallet's address?