I would like to create another account on the laptop, but unfortunately I do not know how it works.
Which Windows do you use?
Here is a guide: https://support.microsoft.com/...er-account
If you are using Windows 7, you can create a new account under "Control Panel - User Accounts".
Which operating system do you use?
Are you concerned about another access on the laptop? If so, which operating system do you use? More information is needed to answer your question also suitable.