Bonker,
What do you weigh now? Will snacks be omitted from your intake or just from the journal? Best!

I would target a certain body fat %, rather then weight. This is because depending on how much you eat and train you can swing weight quite a bit, even if you are keeping body fat relatively constant. For eg., when I first started paleo I dropped all the way down to 130lbs, but was still relatively fat at 14 -15%. After adding some training, I gained roughly 10 - 15lbs and dropped 1 - 2% of body fat to 12-14%.

As a rough guide:
Healthy-ish for adult men: 15% body fat.
Abs showing: ~10% body fat.

If you want to measure there's always the cheap plastic calipers which you can buy online. They aren't precise machines, but they are useful to track progress and to give you an idea of where you stand.

Whatever muscle you have will be reduced unless you add training. That's the way humans are optimized: muscle is "expensive" to maintain. The muscle you won't need to lug around your extra weight will be eliminated, unless you keep training.

Fatty meat, some veg, minmise fruit. No more diabetes.

You also have to do the no grains no tubers no legumes no dairy no processed foods paleo part, of course.

I find exercise helps willpower to eat right. I flew through training today  after just a few days of strict paleo, whereas I was struggling last week to do any exercise at all, probably because of the poor quality food I was eating. You'll probably find your desire to eat junk gets less when you feel good from training.