I am approaching the (soprano) recorder by myself, and have checked several resources online with very valuable advice (e.g. placing the left hand thumb slightly inclined so as to allow it roll - life changer). However, I found very little on the position of the right hand, in particular with regards to the thumb.
From various pieces of information I have managed to gather, it seems that the ideal position is with slightly bent fingers, except for the pinky finger which should be straight.
Does the community have any good "rule of thumb"?