What's the meaning and german translation of....

[mammalilli]

Good evening ,
I'm trying to translate Queen's song "We are the champions" with my 11 years old kids, but some idioms are even for me to difficult to translate. I thing to know the meaning, but I'm not sure:
"I've done my sentence
but committed no crime
and bad mistakes
I've made a few
I've had my share of sand
kicked in my face
but I've come through"

Could someone explain this song to me , please?
Thank you very much
My regards from Berlin

Mammalilli

[Barb_D]

"I've done my sentence
but committed no crime
and bad mistakes
I've made a few
I've had my share of sand
kicked in my face
but I've come through

Although I haven't done anything wrong, I've still had a tough time.
Yes, I've made some mistakes along the way.
People have sometimes been mean to me; I've been bullied.
But I've survived.

[CarloSsS]

I've had my share of sand
kicked in my face

Is that a set phrase?

[SoothingDave]

It is a cliche that the timid weakling gets sand kicked in his face by a bully while he is at the beach, thus humiliating him in front of the pretty girls.