After about 5 years of running only now would I say I have "good form".
That s not about speed or pace but a smooth leg action, arm action ( yes the arms are important)
how you hold your body on the flat, on hills, up and down.
All these things can if not correct give you hip pain, shin splints, stitches, and all manner of lower leg pain.
So often I see runners "running into the ground" as I call it, tense shoulders, arms high, legs with non-existant swing action, simply being stamped into the ground.
You have plenty of time, dont spend it learning bad habits, watch the best on the internet and see how they move. Again not how fast but the action, the flow that should be the same irrespective of the pace.
Find some where quiet and practice form until it becomes second nature.
Dont fall in to the trap that you have a "natural" style that should not be "messed" with,
If its causing injuries mess with it until its walks out and takes the cat. If its inefficiant sack it and get another one.
You learnt to walk and you have to learn to run.
Good fortune.