If you want more information on the First Conditional, listen to this episode of "The Flatmates". Then, read this information on the First Conditional, and finally, try this quiz.
And here are some more exercises:
You can visit the following websites in case you want to learn more about Future Time Clauses.
Finally, here is a fantastic song by Leonard Cohen. If you listen carefully, you will find a lot of examples of the First Conditional.
If you want to read the lyrics, click here.