What happens if i do this

Basically i cant subscribe to premium on tcgp, because i used my nintendo account which is linked to my mums email, and she used the same email but not via nintendo account so basically if i get it free for 2 weeks, she cant cuz itll use the same email so she wont get free trial. so she wont let me do it. I was gonna withdraw my account and sign in with a different email but if i withdraw it will that delete all of my data? Its not like ive got any good cards but i still dont wanna lose my data. tia. PS i wasnt sure what tag to use