I end up with cravings for sweet foods to boost my energy and will often find an excuse to go buy a couple bags of sweets so I don't feel so drained of energy.
Do you have any recommendations I can use to cut down on my high glycemic food intake?
As you drive carbs closer to zero, make sure you're eating plenty of fatty foods to provide an alternate, slower-burning energy source. Also, when massively lowering carb intake, drink plenty of fluids with electrolytes, as that often helps lessen the "keto flu" symptoms of your body's incremental transition to different metabolic balances.
There's a carb-craving feeling that's easy to confuse with true hunger, likely because for so long on a sugar-heavy diet your body has learned your blood-sugar levels have been correlated with actual hunger or plenty-of-energy. But you can remind your body that there's another pathway. I think it's a bit like recovery from an injury via physical therapy: you have to re-teach your muscle/joints that, yes, they can do the original/optimal movements, without pain, after they've spent a while receiving alternate signals.
Tackle sleep issues separately, with things like caffeine reduction, screen-time-at-night reduction, exhausting exercise during the day, a segregated quiet/dark sleep space, etc.
Good luck!
Have you tried just toughing it out for a couple weeks? I've found that even just a couple weeks of abstaining from sugary things drastically lowers my tolerance for sweet things. Previously edible foods start tasting way oversweetened.
Maybe you could replace the sugar with slower-acting carbohydrates like porridge? It's actually quite tasty without any additives when made with whole milk.
Just eating sugar makes you crave sugar. Don't even add it to coffee.