Hey Adalis!
Gosh, it took me a REALLY long time to accept that "My sister and I are not the same person, and it is ok if we are different" message - I'm glad you're getting it. Comparison just makes everyone upset and doesn't help a thing.
I'm glad you've found us. What sort of plan are you going to follow? Most likely, we have a forum for it, so look around and keep posting. You might want to check out the 100 Lb Club forum and the 20-Somethings area, to start.
Can't wait to get to know you!