Downwards is a good start
Get a well illustrated book for a start
simple things like the difference a fox print and a dog.
Here is a fox print (second one down in the photo is a fox print), the one to the left is a dog.
Notice how the print is clearly "longer than it is wide", also there will be hairs visible, dogs rarely leave hair marks in tracks(around the pads and the inside of the print)
Notice the hairs on the feet and pads, this fox had a broken leg, it must have been hit by a car(prior to my bullet) It had not done well since the injury, and I was pleased to put Clubfoot out of its suffering
I was also able to tell that she had passed there very recently as that footprint went down in a puddle or wet mud and it had not rained there for several weeks. The ground was hard, so she passed through when it was raining or just after, and that was just a few hours ago. Obviously a dog had also passed though at around the same time
I caught up with her later that night, shot her ten yards from this print
She was old and in bad condition, but had raised a litter
A dog print is much more square look at the distance from the far left to the far right of the print, its basically the same as the height, if not more, so dog, not fox
Here are fox tracks in the snow
Notice how straight the line is, a dog tends to track sideways slightly when it trots , foxes tend to put the back feet down on the same line as the front feet.
Here is a better view, the prints are in bunches of four which suggests that the fox was moving at a canter, as a straight slow walking action would just produce a straight line of equally spaced prints. The canter also suggests that the fox was very confident at that time, as he clearly was not moving with much caution, neither was he sprinting.
I took the fox from this muck pile a day later with the .243, the cocky git.
and this one is a hare
The hare was resting on its haunches and the two front went down as it moved off
Badger print has a thick bar going sideways and the four claws are usually visible, tends to leave a line between the foot prints in snow where the badger cannot lift its feet above the snow level.
Hope this helps a bit
Make the use of snow and wet conditions,it really helps.