What can a freshman say?
Introduce Yourself
High school is probably the worst 4-year-period of your life, whether you are "popular" or not. Just some advice: don't worry about quantity when you are picking friends. Its better to make 1 or 2 really good friends than to have 1000 artificial friends, who you forget about completely when you go off to college (or whatever you do after HS). Theres only 3 or 4 guys that I knew in high school that I still consider myself friends with today.
Also it is becoming increasingly "mainstream" to do "non-mainstream" things, ironic, yes, but its true. Everyone wants to be different, but in doing so, they are becoming the same. Don't try to be different just for the sake of being different.
Just be you.
"Dont let anyone look down on you because you are young..."1 Timothy 4:12