You’re going to need an under pocket and a pocket facing. The under pocket will show, so plan your fabric choice accordingly.
Begin by pinning the pocket facing to the garment, matching raw edges, right sides together
Stitch the facing to the garment
If necessary, clip curve and/or trim seam allowance
Understitch (basically top stitch, but on the side that isn’t going to show:the underside) the seam allowances to the facing
Turn the pocket to the wrong side of the garment and press
Pin the under pocket to the facing, matching raw edge curves, right sides together
Make sure to not catch the garment with the pins, you only want the pockets together on this
Keeping garment out of the way, stitch the facing to the under pocket along the curved edges
Pin pocket in place to the garment and go from there.
Cute lil’ front hip pocket