The most common angle is 20 degrees. I'd say the closest example of getting that angle would be to take 2 quarters and put it on your stone.
Take your knife and rest it blade down on the quarters. That should get you relatively close to 20 degrees.
With that stone I provided you want to go diagonally corner to corner. Nice and smooth no need to add shit loads of pressure.
Do one side like 10 times, then flip and repeat.