When you land on your toes of your front foot don't just pivot but reach high /push up onto tip-toes a bit , then think spinning the ball 'up and over'...should help to drag less down .
Regarding release /grip you're better off ( if you dont have big fingers/hands , and a lot of finger strength) to bring your index and middle fingers closer together rather than try to splay them further apart just to approximate a 'normal' grip . In other words , sometimes what feels a looser grip may give more control , and actually impart more turn/revs.
Sit down on a chair in front of a wall with a ball and just experiment with comfortable grips( flick the ball towards the wall ,watch the release and revs etc) . See which ones have the best mix of control and purchase on the ball . Also you can experiment with putting your thumb pad on the ball and then try putting your thumb nail on the ball instead ( some people flick their thumb from this position to gain extra revs.
Lastly ,( this is less orthodox /only feels natural to some ) some very good ( including former first class finger spinners i know) spinners with small hands cock their wrist inwards ( ie fingers facing towards face , wrist bent to maybe 45 degrees) and instead of spinning/releasing the ball out the front of the hand , spin /release the ball over the top of a somewhat horizontal index finger .