Pls help!!!

I'm so new to linux that i'm still reading the book.....

I want to reintall Red Hat 9.0 because i ran into problems so i rather start all over again.
But i use my MsDos start up disk to see the partitions i don't know witch partition it is that i have to delete.. Pls don't laugh if you can help please be my guess i'm trying my best to get along with linux but it is not trying to be my friend...lol......help me!!!!!!!!!!!!!ha

Do you think that i should of had started with an older version of linux b'cause the first time i even touch linux it was red hat 9.0

taiwl thank you for your help