Hey Keiya!
I'm right there with you. My biggest problem now is actually getting started; i know i need to, and i know what i need to do, but every morning i wake up it's always so hard to drag myself out of bed and actually make that change from plopping down in the computer chair or the couch and tie on the walking shoes. I'm a big excuse maker myself.
The only advice i can give, as cliche as it sounds, is to try your best! Even if it means sort of forcing yourself one day to get outside and start walking, or anything! At first i was always weary of that thought, but after cresting that first hill, it just gets easier and easier.