Backside surfing

Recently Ive been surfing really good and progressing a lot on my frontside surfing (regular stance) I can perform cutbacks, off the lips and almost some more progressive maneuvers but... my backside surfing is terrible. I can go down the line just fine but have a problem with bottom turns top turns and speed. Everytime I go left I try not to but I always end up just completeley standing up, no compression at all and it just feels akward. ANY tips would be much apreciated thanks!