Erase the faces in red, as this where the fingers will be welded with the hand.

Move to the top of this join the vertecies indicated by the arrows.


Adjust the vertecies and align them with the function 3d Snap in vertex mode.


Add divisions with Cut Edge to allow the welding of the fingers on both sides.
(hide the other fingers by using Hide Element)


Stop to align the vertexes and weld the model into one with Weld Selected.

Finish the adjustments by viewing Meshsmooth and working with the LPM cage



Aspect of the glove from different angles.


Extrusion of a face for the thumb.
After the first extrusion, make plane the rectangle, that improves the extrusions to come.




As with the fingers, extrude the thumb completely and adjust the verticies to give a more anatomical form.



Aspect of the hand after adjustment of the thumb.

This part takes time and skill so observe your own hand well to get the look right.