Remove hardware, sand (where you want to stain), repair and clean piece then spot block/prime if required. Apply first coat of chalk paint (brush or spray) and stain to wood and wait for recommended time before applying subsequent coats.
Now that you've got your vision, paint/stain selected you'll need to remove any hardware from your piece you don't want paint/stain on.
Tend to repairs.
Clean your piece with Sugar Soap or TSP and let dry.
If your piece is mahogany, a red based wood or Indonesian wood, you'll likely need to prime or spot-block tannin bleed through with 'Polyseal' or a shellac.
Go ahead and apply your chalk paint,mineral paint with a brush, roller or spraygun or stain using gloves and a foam brush. Remember, the first coat won't look great in terms of opacity, that's totally normal. The subsequent coats will help to address this.