"Take a look at the basic grip of the off spinner. The key to the grip is to have your fingers so they are comfortable on the ball to allow you to spin it as much as possible.
The only difference between an off spinner and a leg spinner is the release. An off spinner will look to come up and over where as a leg spinner will look to be a little lower with the wrist going from right to left. As an off spinner you are looking to pitch the ball outside the right handers off stump and spin the ball to the left side. With the ball hitting around middle stump. This will entice the batsman to try and drive the ball against the spin, which will create chances.
Having a good run up is about getting your weight driving towards your target. So try to keep your run up as straight as possible. In your delivery stride aim to have your feet and shoulder side on towards the batsman. Don’t over stride on release, as this will cause you to collapse and lose height in your action.
On release drive your weight towards your target. Drive your back leg right through and try to spin the ball off your index finger. The seam, ideally, should be angling towards the left stump. And try to get as many revolutions on the ball to maximise drift and spin.
After you have released the ball drive your back leg straight through towards the batsman with a full pivot. The likely dismissals for the off spinner are Bold, LBW, or catches around the bat at short leg or leg slip."