I need help

I am 18yo and I have discovered that my penis should be able to retract,problem is that I can't do it at all.I can't ask my parents since they probably would make me undergo circumcision,and I can't buy rings either,because I couldn't possibly hide it from them.

I would appriciate if someone could tell me if: I a) have a chance b) how can I stretch my foreskin (preferably a video since English is not my first language)+tips