Interested to know where people put their left and right thumbs when they grip

Ive developed a habit of holding on to the club with my left and right thumbs from where I lose a lot pf power and also sometimes block to the right as I cant release the clubhead

The right thumb I kind of get out of the way near the right index 'trigger' finger but I cant seem to get the left thumb out of the grip without it feeling its somewhere it shouldnt be

Help !