Is it possible to change the email associated with my Apple ID? I don’t use that email anymore and have no idea what the password is.

If you mean that you don't know the password to the email account but you do know the password that you use to log into your Apple ID that use it for, see: Change your Apple ID - Apple Support

and be sure to note the following from that link:

Before you change your Apple ID

Sign out of all Apple services and devices that use your Apple ID. If you want to use your iPhone, iPad, or iPod touch to change your Apple ID, stay signed in with your Apple ID on only that device.

Note the restrictions in the article.

Apple ID Name Change

 What to do after you change your Apple ID or password - Apple Support     I suggest doing this before you change your Apple ID or password.