Open up a Roth IRA.. make a 2020/2021 contribution.. which means buying some new shares.. or if you already have shares in a different retirement account.. you could do a Roth conversion.. which means paying taxes now (if you think the shares will be worth a lot more in the future the conversion might make sense.)
I am not a tax consultant and I would not take anybody's advice on this board about tax matters without consulting a professional:)
I'm pretty sure you are not able to transfer existing shares into a Roth - unless they are already in an existing qualified retirement account (again, you would probably need to buy new shares)..