I hear you. Consistency is key. Scheduling a race few months in the future can clarify the immediate 'why' - the big picture is not the race but health. The path is the goal, really. This becomes clearer with consistent training. Like with anything, progressive overload comes naturally as consistent training builds endurance and an/aerobic capacity. You just operate at the increasing levels of effort your body and mind can handle. Consult your doctor if any health concerns arise as you progress and observe your body. Good luck, I'm off to my morning run!