Sounds like you're starting way too much at once, IMHO. At 235lb, 1300 calories sounds way low, especially if you've just started exercising, too. Maybe try 1600 or 1800 instead. And cutting out the sugar is great, but you can expect to feel pretty dead until your body gets used to it.
For me personally, I have much better success if I start one thing at a time. Start counting calories (probably around ~1800/day, I'd guess) this week, add in the exercise program next week, then start phasing out the sugar. Drop your calories lower once the weight-loss stalls. I think you'll feel better and have more sustainable progress if you don't just jump into it full-throttle.
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