Sounds like a great start. I'm also starting today. I am addicted to sweet things so it is going to be hell for me to give them up.

I'd cut the OJ too. Although it has no added sugar it is packed with fructose especially as it is concentrated and not like eating one orange. Dilute it with water if you have to have it and definately aim to drink more water. Even if you add some lemon juice into sparkling water to start with. I find that filtering the water makes it taste better too so get yourself one of those filtering jugs and fill it in the morning and aim to finish it by the end of the day.

Good luck!