Yes, you can do this and you should not be taxed on the contributions because you did not and will not take the deductions.
For the 2021 tax return, you made a $6k contribution to the traditional IRA (Roth IRA recharacterized to traditional IRA), and you can contribute $6 to your traditional IRA for the tax year 2022. You will enter on your 2022 tax return the $6k as a contribution to your IRA. Convert the traditional IRA to Roth IRA before you invest the fund(in the near future), you will receive a 1099-R form early next year and enter the form on your 2022 tax return. If you don't take the deduction of $6000 on your 2022 tax return, it should be a non-taxable event unless there are any earnings between now and the time you convert.
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