Hi Nicoli, to get your statistics down the side, go to User CP at top left corner of page[highlighted in blue]scroll down to Edit you Details, put all your info into this form, you'll find the part about weight at present, goal weight etc down at bottom of the form.
For the signature bar which shows your weight as you progress, you need to have posted on the forum 20 times before you can access this.
Hope the info helpful, if you have just started LL good luck, we're always here to help each other.
Janey xx