Go to ramblinwreck.com/tickets
Go to My Account and log in with whatever account you used to purchase your ticket
(if you don't end up on the My Account page after logging in, click your avatar/your initials in the top corner)
Under "My Tickets" you should see "Transfer"
This will take you to a screen you can enter a phone number or email of the person you want to transfer to.
That person will then receive a text/email to add those tickets to their Apple Wallet or Google Pay account.
They also have an area under "My Tickets" you can sell it through SeatGeek, though I've never tried that before.