Welcome, Koula. Your two little girls should be great motivation for getting fit. And what a great role model you'll be for them as you adopt more healthful habits. Sorry about your back problems - I know that must be tough to deal with.
Most of the conversation on this forum seems to be in the weekly motivation thread. A new thread starts each Monday. People post their goals for the week on Monday, then report back daily (or as often as their time permits) as to how they're doing. Check it out and feel free to join in.
Age 61, Height 5'9"
March 2010 145 lbs, Jan 2013 173 lbs
1st Goal 145 lbs 5/25
New goal 140