Decarb/RSO high CBD strain advice needed

[Filthy_McNasty]

Just about to harvest REMEDY - high CBD strain (around 20% , almost no THC).
I am finding some confusing/conflicting decarbing info about the right temperature/time.
I will use simple (convection) oven method. So, what is recommended temperature/time to get the most CBD out of it?

I want to make RSO (using rice cooker method) and use it mainly for medical purpose.
Is decarb method necessary or I can proceed to making RSO right after curing?

Thanks!