Order of operations with (backdoor) Roth IRA

Ok so, I’ve decided to look into funding a Roth IRA.

I do not qualify for normal contributions into a Roth because of my income.

I’ve opened a traditional IRA, and have been funding it with after tax dollars.

I’m wondering what my next steps should be to not screw myself with taxes.

Do I open a Roth IRA with after tax dollars now, then roll into it later?

Do I open a Roth IRA using only the money rolled from the Traditional?

What is the best way to proceed?