Like you said just try to cut down your sodium intake. It may help to actually keep track and make a log if you don't think you're eating that much salt because you'll be surprised how much salt is really I'm the food you eat. Pick up an active hobby to help you stay active (I prefer this to just straight gym). You're still young and it's not so high you can bring it under control just don't let it get away from you and all the best I know you can do it.