Can I have 2 iCloud emails?
can I have 2 email addresses associated to one apple ID. And if I can’t, how can I change are a new iCloud email to replace the current one that I have?
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You can get up to five alias addresses associated with your Apple ID.
You can do this by signing into icloud.com and going to Mail. Click on the gear in the top left then choose Preferences. Click on Accounts in the column on the left and you will see how to create a new address which points to your iCloud address.
You do not need to set up a new Apple ID.
Apple has a description in the iCloud user guide at Add and manage email aliases for iCloud Mail on iCloud.com