WTB slicks

Well i went to the track and it didnt turn out that good tires were spining 1st 2nd and 3rd. so the 2nd pass i did i launched aroung 2500 and the tires still were spining bad so the 3rd time i didnt launch and first gear i didnt really floor it but when i did they still were spining. so thats the problem im faceing and im trying to learn the track i suck at it people were telling me to get slicks and keep trying to learn.