please please give me improvements for my song!

ive been recording songs on n-track software for well over a year now, but ive been listening to other peoples songs posted on the n-track website and realize they sound a lot better then mine. please critisize this recording and give me loads of ideas to help improve my recordings. most notably the vocals dont sound good compared to others on here, could be cause im using a sanyo mic thats a good 10 years old. anyway this is a link to my song:
What You Really Wanted
thankyou!