I want a fresh start, if i delete my linked account on the game, will it prevent me to link my newly made account on it?
Hey there!
If you delete your linked account, you will no longer be able to access it and it will be removed from the database.
What you could do is register emails to both accounts. ( Just make sure they are separate ) You can use the “Use Existing User” method to sign in with your other account. 
If you want to start completely fresh, then you can proceed to click DELETE ACCOUNT and clear your device app cache & info.
Keep in mind that this DOES DELETE THE ACCOUNT. It cannot be recovered, so make sure it’s something you for sure want to do.