Which is the correct sentence to express my belief in Christianity?

My apologies for the inadvertent errors.

I have taken faith in Christianity.
I have embraced Christianity.
I have been converted to Christianity.

Which is the correct sentence to express my faith in Christianity?

Thanks.

Could someone please help? Thanks.

All three seem more an expression of conversion to the faith than a continuing faith. I'm not sure I've expressed that very well, but at least I know what I mean.

To keep it as simple as possible, why not just "I am a Christian"?

Thanks, roger.

Does "I am a Christian" drive home the fact that I have become a Christian after being convinced by someone that I should become a Christian?

No, it doesn't. It could also allow that you were born into a Christian household and never made a change. If that's what you want to convey, any of your own sentences will do nicely, and I see nothing to favor any one over the others.

Thanks, roger.