I'll try to describe this so it's not confusing.  My zoho email is currently set up this way:

primary email is info@domain.com and it's forwarded to my secondary email, which is sharon@domain.com.

I ultimately want to upgrade to the paid Zoho so that I can have two domains but I don't want to pay for three users when there is really only one user (me).  So my question is really for the interim step of consolidating those two emails mentioned above.  If I delete the sharon@ email address can I then change the primary one to sharon@?