If you've caught it early and it hasn't spread to any other place besides your testicles, you'll probably be fine. 95% of men who are diagnosed are cancer free within 5 years.
On the other note, how fucking selfish can you be? You tell you parents STRAIGHT away. This isn't all about you anymore, your parents most likely love you and adore you.
Don't you think it'll be much better sounding if it came from your mouth? because I doubt your uncle will keep his mouth shut.