I viewed your profile and see that you train with horses. Excellent and unique business model! So how about something Latin based stemming from either Equestrian or Equine
For example and to start brainstorming…
– Core Equestria or Equestrian (or some other variation from the Latin Base “Equestr” meaning horseman)?
Another term for core can be “crux” (basic, central, or critical point or feature).
I hope this can get some ideas going and hope you find something that fits!
Best in Health,