No need worry about noob questions.
Part 1:
If you are 55 this year, CPF Board will only transfer FRS ($213K) from your SA (if not enough, it will take from OA) to RA. Let's assume you have more than $213K in SA.
So, you have $213K (FRS) in RA. Your SA will be closed. Whatever remaining amount will be transfer to OA.
If u do nothing, leave it there. After 10 years, when u r 65 yo. It will grow to $319,400
If you start CPF life payout at 65 yo, your monthly payout will be $1,730 (standard plan)
Note: CPF Board will not transfer more than the FRS ($213K) amount
Part 2:
If you think $1,730 per month, is not enough, you can then decide whether you want to transfer more money from OA to RA up to prevailing ERS ($426K in 2025). The earlier you transfer the better because it starts earning interest.
Let's say you want to top up to $426K (prevailing ERS in 2025), you need to transfer $213K from OA or cash.
You leave it there for 10 yrs, when u r 65 yo. It will grow to $628,600
If you start CPF life payout at 65 yo, your monthly payout will be $3,330 (standard plan)
Note: All these info are from CPF.
Part 3:
In 2026, the ERS is $440,800.
In Part 2: You have already top up till $426K (ERS for 2025)
Now, you can top up $14,800 to your ERS in 2026
Now you have $440,800 in RA