401k to Roth IRA Conversion over 60- 5 year rule?

I have seen a couple conflicting answers to this.

 

Assume

I am 60.

I convert part of  a regular 401k to a Roth IRA.

I have other Roth IRAs from many years ago.

 

Can I access the rolled over amount almost immediately?  How about any earnings?

Or do I have to wait 5 years for one both ( and if I don’t wait, what happens? Tax? Penalty?).

 

 I have read and seen many conflicting answers on this, so hope to be pointed to the IRS doc that confirms