I quit sugar and then artificial sweeteners a few months ago, which I now realise was probably the wrong order. I found that quitting the sweeteners was far easier and massively cut the sugar cravings, so maybe try quitting sweeteners first?
It's been great, though. I upped my good-fats to make up the calories and, after the initial lull in energy levels, I feel like the level remains far more constant throughout the day - as opposed to dropping off a few hours after a meal.
It sounds so nauseatingly cliche, but I sometimes forget to eat, such is the lack of noticeable decline in energy.
As above, make sure you drink lots of water. Stick with it!