Understand that some newbies are real totally new persons in this forum.
@OP
Since you're using a single GPU to "try" mining, I bet that the system you're using was Windows, right?
If that's the case, you can use the miners available here in the forum (
https://bitcointalk.org/index.php?topic=647251.0 or
https://bitcointalk.org/index.php?topic=632724 or use search - "miner")
You only need to point them to the right pool that mines the coin you want to mine. like halker2010 said.
Except, his example was for Bitcoin, and i don't recommend mining Bitcoin with a single GTX980ti.
Choose an altcoin with a nice value and a low total hasrate, excluding cryptonote coins.
If you need more information, the best action is still using the "
search" function.