"how best should i configure it."
BTW, that's hard to answer because what you appear to be doing is so unusual, unclear whether there's some unique requirement trying to be met, or whether someone is just not really familiar how to use OSPF.
In your diagram, you show OSPF connections between a branch and HQ across ISPs. If these are truly Internet Service Providers, you cannot connect OSPF across the Internet without using some kind of tunnels. Possibly, the ISPs are also SPs, who provide some kind of private cloud or virtual connections between your sites.
So, would need much more information about your network, and your goals, to really make suggestions.
Understand, suggestions might be made for how to better do failover from primary link to secondary link, but again, what you've explained so far, is so unusual, a "normal" OSPF approach might not work without additional changes to your OSPF setup.
Not only is using two OSFP processes, as you're doing, highly unusual, but using two different area links between HQ and a branch, is rather unusual too.
