You set up a Roth IRA in the same way as a regular IRA, except you check the “Roth IRA” box. That means you won’t deduct your contribution from your taxable income. I don’t know any of the tax rules, but I’m sure you can get it all by “googling”. I can buy stocks in my IRA, and my neighbor bought real estate with hers (land via an investment firm). I bet you can do the same with your Roth IRA.