Help with mastering vocals for an important recording..anyone please?

Hello guys!
I was wondering if anyone is willing to help me make my vocal track sound as professional as possible.
A radio station in Europe , well is a long story, but they played one of my youtube songs over there and asked me for another so I want it to be as good as possible so any help is very appreciated as this is very important for me.
If anyone is willing to help, please PM me to get in contact.
Thanks!