IRA beneficiary - Required Minimum Distributions

I'm looking for clarity around surprisingly dynamic IRA rules.  I inherited a traditional IRA in 2020 from my dad who was 89.  Following the Secure Act, it is my understanding that I have 10 years to withdraw all of these taxable funds.  I'm trying to verify that I can take the distributions at my convenience as opposed to annual RMDs.  But I have seen some information that suggests that because my dad was already taking RMD's from this account that I may be required to take RMBs as well.  Can somebody verify my RMD requirement or point me to documentation that specifies the current rules?  Thanks in advance.