Hello mate. I rehab quite a few of these as an NHS specialist MSK Physio. Infact, i've just discharged a 64 year old chap who had surgery for essentially the same injury about 9 months ago and we've got him back playing competetive tennis. Highly motivated chap.
In my experience, here is what you should expect... 6 weeks no lifting, 4 months of considerable post op pain, about 6-9 months before you get back to riding. So long as you do your Physio there is no reason you cannot get back to trials.
As far as rotator cuff tears go, there are hundreds of older people walking around with degenerative cuff tears anyway... who dont even realise... and they function just fine. The shoulder is very clever at learning to compensate so if there is any long term cuff weakness other muscles can learn to help. Shoulder braces are ususally designed to stabilise subluxing/ dislocating shoulders where there is too much capsular/ligament laxity. If you can strengthen up your cuff again and there is no ligament laxity then I doubt you will need a brace.
Good luck!