Of course I would be very happy to help. Its really easy. Go to search, by start menu type users. Go to user accounts. Then go to manage another account, then open new account. Then just follow the prompts. Make sure that you choose administraors account. Do not delte the old account, until you are sure you are happy with the new one. If you are unsure, there is no compelling reason to even delete the old account.
On second thought, do not delete it. Use the new one for a while. If you really want to delete, lets talk first. I or another equally helpful member will always be here for you.
The only big error that you could make is if you do not choose administrator account. It will be clearly shown. If you do not delete the old account, right away, any error can be corrected. Dont worry, just enjoy.