@Dom - welcome to the forum !

Hardly a "wizard" here, still very much a beginner - but - I have found the following techniques quite useful - especially since I have an "unusual" bow hold (damaged pinkie).   

To get used to using the whole bow ( and of course to get used to altering bow pressure as I get closer to the frog ), I started by just performing open string bowing, using the entire bow length, in both directions.   I "doubled up" this exercise by trying to bow as "gently/slowly" as possible, whilst still drawing a steady, unchanging tone from the instrument.  I started by trying to make the end-to-end bow movement last for 10 seconds....  It's an exercise I still do from time to time, and now I quite easily have a "constant" bow stroke which can last fully 20 seconds.    When I try for 30 seconds full bow stroke, I rarely manage it faultlessly - the bowing is now SO slow for me, my fine muscle control sometimes falters, and I get the occasional "scratchy sound" or the bow hair sometimes fails to "bite".   I now vary the exercise by playing as many unbroken 2-octave scales as possible during each bow stroke - but to be honest - when I started this, doing anything with the left hand was almost impossible - my full concentration was required in the bow control (direction and varying the pressure).  I feel it is now becoming an automatic, or sub-conscious activity.

That, just as a relatively un-informed beginner is what I did ( and still do ) to feel completely at home with the bow across its full length.  I also found the exercise helped develop the flexibility required in the right-hand wrist (well, it was always flexible, but it helped develop the "muscle memory" needed to maintain a correct bowing angle - I initially had a horrible habit of swinging my elbow without compensating at the wrist - and of course the bow would wander over the strings in all sorts of odd directions !    Oh - and on THAT topic - I found an exercise which as a beginner was also really useful - put down the violin, make an open circle with the thumb and index finger of the left hand, hold your left hand in line with where the bow would travel, and, holding the bow upside down (yes) so the stick rests on the base of the circle you've created, start "bowing" ( and do avoid running the bow hair across your skin ! )   I no longer do this, but, it was an initial help which let me see, and understand what corrections I needed to make on the right hand during full-stroke bowing....

   That's just my "findings" on the topic - I am sure you'll get different, and better suggestions from other, more expert than I, members here !    And good luck with the journey !