One consideration is where along the clavicle is it broken. There are different techniques for repair from a figure-eight brace around your arms and across your back to open reduction and fixation.
For good advice, go to an orthopedic surgeon who specializes in shoulders. In your place, I would call all of the bicycle racing teams and clubs in Spain for a referral.
I broke mine and did not do that. The surgeon put on a figure-eight brace, and it did not heal. After six weeks I took it off and had adequate range of motion, so I did a push up, and that went well, no pain. Today, thirty plus years on, it is still broken, you can see the stump and feel the protuberance.
Good luck.