Hinging your wrists early in the backswing?

Ideally there is no active manipulation of the hands & wrists in the golf swing motion, from the start of motion, through impact to the finish.

Too often as the hands move from the get go, folks actively either initiate a wrist hinge straight away so 'pick' the club up into what will become an oversteep backswing with great risk of a 'tllt' & reverse pivot standing up out of posture with very little width it's all a good ways too narrow {instead of some natural width, a body pivot in posture & a shoulder turn} with all the miss-contact shots that then leads too

Or from the get go of motion folks will roll the hands & wrists over, right hand & forearm on top of left so taking the club back very sharply inside around the legs & flat which pretty much will ensure most will then throw any small angle that might just have been engaged & then on start back come a good ways out & over the top so ending up with a flip through impact, often into the much dreaded chicken wing finish with most of their weight still on the wrong trail side.
Either of these is a ways wrong for obvious but different reasons & both will cause numerous bad shots & a whole deal of anguish.

My take:
If, as you should, you can move your 'triangle' shape of your arms keeping the same 'Y' shape relationship with the club, keeping the convex angle of the left wrist that was there at address whilst retaining connection with your body/shoulder turn until the whole of this 'still hands' (no active manipulation) plus arms & club unit move 'intact' until just past the right (for RH) thigh, then you'll have made the best start to a swing motion that's possible.

At that hands just past the thigh, the right hand/wrist will begin to soften back & hinge, it will do this because the body is turning & while the radius of the left arm during this body pivot initiates this right hand/wrist 'hinge'.

As it all continues back a ways further, at around hip height or soon after & because the right arm will have to fold during the continuing body pivot, the folding right arm is the catalyst that makes the left hand/wrist 'cock' upwards so the left thumb sets upwards to the sky.

Where exactly after hip height this all happens depends largely on the golfers ability to co-ordinate width with the arms/hands/club whilst them still being 'connected' to the body turn. {Some like Davis Love can still 'connect' the turn with great width with the arms & club, so if it's wider like this the left wrist cocking upwards will occur much later in the backswing motion more at shoulder height.}

Comfortable natural width for most which provides an easier 'connection' with the turn, will mean the 'cocking upwards' of the left thumb/hand/wrist will happen at or soon after hip height.

It's the fact the the left hand/wrist & right hand/wrist perform two slightly different functions in the 'set' that enables the 90º angle between left arm & club shaft, the left wrist cocking upwards largely responsible for this, & the flat left wrist at top of the backswing which then has the leading edge of the club face perfectly parallel inline with the left arm, it's the fact that the right hand/wrist softens backwards & 'hinges' back on itself that largely controls the 'flat' left wrist angle & club face position at top of the swing.
These differing motions of the hands in the set then places all the 'angles' in the correct alignment relationship to return down & through impact with no compensatory movement needed, to provide the best consistent impact conditions.

(re 'flat' as ideal, though there's a range from slightly convex 'cupped' of slightly concave 'bowed' that will still allow good impact conditions with out compensatory movement in the downswing. But very cupped or very bowed left wrist positions will mean there will need to be a good deal of compensations made to get decent impact conditions, not impossible but just makes you much more reliant on timing + compensations to get those good impact conditions, complicates things makes consistency harder to achieve}