A Roth IRA is an account where you store your money. You likely already understand that but just clarifying. So instead, check out Fidelity or Vanguard to open a Roth IRA. Once you have moved money into that account, invest in low cost index funds. Rinse and repeat!
I’d add, that I generally wouldn’t open a Roth IRA with any bank or credit union. They’re great for storing cash, but usually not great for investing. They’ll let you open a Roth IRA, but as you see, they want to put silly things in there like CDs which make no sense if you’re building long term wealth. So heed @dgurgan’s advice and find a discount online brokerage and buy yourself some index funds