Figuring out WW points.

How do you figure out how many points you are allowed every day. I really want to try this WW but I have no will power and ever since I got engaged I kept saying I have to lose weight I dont want to be a fat bride. I just have No will power. and FH doesnt really help. He can eat anything. It is so hard cause I am only 4'10. so I should weigh like 90 LBS