Good for you for starting!
I don't know about you, but I'm not an all or nothing kind of person. That's what did me in the first time.
This go round my first 30 days were to just cut out carbs at lunch, breakfast and dinner stayed the same. After that became habit, I started to change other aspects, like kicking my sugar habit completely.
I know it's easier said than done, but don't put too much pressure on yourself. Commit to making good changes every day.