Retirement tax questions

I am caught up with the IRS guidelines :" each IRA conversion starts a new 5 year clock for tax free withdrawals: that obviously doesn't apply to principal, which has been taxed.  Is it your point that this requirement does not apply if I am older than 59 1/2?

 

The IRS guidelines are confusing because of the different rules based on age : even financial/tax experts have given me conflicting advice or punted.

 

To be clear : over 59 1/2 with a Roth that has been established for > 5 years : any IRA conversion to Roth at any time is able to be withdrawn tax free including earnings. Is this correct?