heavy weights

Im a big bloke naturally so dont want aesthetics so should i just keep picking heavy stuff up, pushing heavy stuff and lifting heavy stuff, strength is more what im aiming for, im doing a split shoulders and back, arms, and chest, concentrating on the cardio to lose the beer belly, simple diet too, one decent meal of meat and veg a day, any suggestions to changing this routine up a bit, i sometimes do ultra high reps of 5kg dumbells and ache like hell for a couple of days just to change it up