cardarine will help burn fat, but at the end of the day if you want abs you gotta lose total body fat. can't tell you how many fat people over the years hopped on var and kept their bellies
the cliche of 'you build abs in the kitchen' is true but i would call it 'you burn fat so you can actually see your abs in the kitchen' .. the #1 thing you can change is stop eating out, restaurant food is gut food .. for more help hit me up for a consult, i specialize in getting people leaner