You have plenty of time to recharacterize your 2020 contribution as a Roth if you choose to do that.

It's not clear which is better. Depends on your tax bracket (filing status, dependents, etc.). You will have to do some work to figure out whether you think your tax bracket is higher now or later. For most people working salaried jobs, their tax rate is higher now and traditional is better (if things stay as they are). But you are just starting out and you seem to expect to make a lot later, so Roth may be better.

If you make that much, you will end up doing backdoor Roths later anyway because you will lose the deductibility of your traditional contributions.