Make sure the disc is flat if it isn't flat it will most likely not hit your target. Here are some more common mistake Most common mistakes.
Where can I play frisbee?
If you want to join a team just ask somebody who plays the game and they can try to get you on a team. Or if you just want to play with friends make 2 endzones like football and play it's pretty easy to setup.
How can I improve?
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This is a frisbee keep throwing and you will be as good as kevin bower who is a very berry king. Also you can learn a flick here How to throw a flick.