No one is spending 5 years on reserve as a captain.

Some people who transfer from another airline and upgrade immediately may spend 3 years on reserve, but that would not apply to you.

There's really no way to predict what might be happening in 2022 for somebody hired this year. Good chance that with growth slowing the normal order of life will return and you will spend 3-5 years as an FO and then upgrade at the time of your choice.