You don't just get rid of the fear out of nowere, it comes from years of riding and doing stuff on your bike thats gives you confidence to hit something.
ive never hit that big before thats why im pretty chilled, any tips cause its like a huge step down, lean back maybe?
No, don't lean back too much. The best advice i can give you is to let your wheels land parell to the landing. That is, if the landing is fairly steep.