Do you have any other traditional IRA money invested already?
If not, then the best thing is to do a non deductible traditional IRA contribution and immediately roll it over into a Roth IRA aka backdoor roth contribution.
It doesn't work so well if you already have a large amount of traditional IRA money invested with gains. if you do a rollover from a traditional IRA to Roth you can't specify an account. All the IRS cares about is across all traditional IRA accounts if you convert 50% into a roth ira then you pay taxes on 50% of gains.