If by “life planner”, you mean something like a calendar or list, just try experimenting with the shapes tool and pen tool to create some basic content areas.
Draw out a rectangle and make the stroke black.
Then Copy it with Command C.
Command F to paste in place.
Alt + drag to create a copy of something.
Hold shift while performing actions like this to move options at right angles.
I dunno. Pretty vague request. Good luck!