help!!!!!!

I got award letter from NYU today.As i am permannet resident i qualified for federal loans.In my award letter there is written that i will receive something from HESC regarding how i will go for loans..but when? should i go to apply for loans or wait for HESC.pls tell. Also in my fafsa i didnt fill that i registered at selective service system (SSS) bcause i am 28 years old and i was over 26 when i entered usa.Now in my award letter they r saying u didnt register at SSS and if u qualify for exemption write a letter for reason....to whom?? and do i need to??