How to scale and rotate a sprite renderer using one touch?

Hi,

I have a sprite renderer which I want to scale and rotate using one touch only.
What I want to achieve is like how you can control the stickers in PhotoGrid app.

I am using Easy Touch 5 for the touch gesture and DoTween for the rotation and scaling.
And, I was able to rotate the sprite renderer already. But, it is only rotating counterclockwise and not that smooth.

Here's my code for the rotation:

 public void Rotate(Gesture gesture) {
         worldPoint =  gesture.GetTouchToWorldPoint(new Vector3(gesture.position.x, gesture.position.y, 0f));
 
         deltaX = worldPoint.x - this.transform.position.x;
         deltaY = worldPoint.y - this.transform.position.y;
 
         angle = Mathf.Atan2(deltaY, deltaX);
         angle += 10;
 
         rotation.z = sticker.transform.rotation.eulerAngles.z + angle;
         sticker.transform.DORotate(rotation, 0.00001f);
     }

Regarding the scaling, I'm quite lost where to start.

Thanks in advanced for those who will answer my question.