Since you used the nonfiler form, and that portal is closed, you will claim your credit when you file your 2020 tax return.
In your case, the data on your 2020 return will determine your eligibility for the credits. TurboTax will ask you about both payments as you complete your return. Simply enter -0- for both answers and watch the program add the funds to your refund calculation (or subtract them from your balance due.)
You should be able to file your return to claim this money in a few weeks. Congratulations on your new job!