How can I study sign language?

im not deaf but I admire sign language so much. Im a beginner and Im really getting into this. Is there a particular website were I can study sign language or take online lessons that are free. I cant go and take classes because in the country I live in there are no classes like that. So only websites please.
And if you do know, how much time will i need to master sign language?
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Christian Sign Language help?

Every year, there is this competition between AG churches called “Fine Arts Festival”. Students compete in drama, singing, and other talents.

I have been looking into doing sign language this year.
Basically, you choose a Christian song and sign to it. The problem is, I know no signs. But I really want to compete this year.

So my questions are these

-What is a good Christian song to sign to?

and

-What is a good online site to learn sign on that is free and easy?

Thanks everyone:)
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