hmmmm. I see you're new here, just want to say welcome.
The commitment being what we need over motivation is a song sung a lot here, so you're kind of stepping into a snake pit with that one, just thought I'd let you know.
Motivation though honestly, is fleeting, it might be what gets you started, but it's rarely what sees you through to the end.
My real dad died of complications from diabetes in his 40's. That was a motivation for me. I still think of it when I feel like things are getting difficult, but studies have shown that motivation and fear and worries about health and all that, are not enough of a 'punishment' to see us through to goal. (Just read an article about that actually.)
It's just a matter of waking up, and doing what you know needs to be done, even on days when there is no motivation to speak of.
I'm glad you're so hung ho though, I assume you are a new years resolutioner. Welcome.