Sorry about your misfortune.
There is no protective gear for a collarbone. Knees, shins, elbows, eyes, wrists. hands, ankles, heads, necks, hips, backs, ribs, even balls, but there really is nothing that will save you from a hard fall on the shoulder. Nothing that is practical anyhow. (I did my right shoulder in twice and unsuccessfully searched for the same magical protection). Even full on downhill body armour does not protect the shoulder.
Once the bones fused, it is quite strong and the biggest problem with a fall after that is because the tendons are often very stiff after the healing period. If you fall again soon after, people often tear shoulder ligaments and that can be a much bigger problem to sort out. So, concentrate to get flexibility back through physio and stretching exercises afterwards. All according to what your doctor says of course.
B.t.w. did you have it pasted together surgically with plate and screws, or is it healing naturally in a sling only? The healing / recovery / rehab times will vary radically depending on the type of fracture you had as well as how it was treated.
Heal well and don't be in too much of a hurry to do the crazy stuff again.