I know how overwhelming the list of options can look at first.
The difference between "caregiver" and "caretaker" is explained on this page, and I bring that up because it highlights how much more is expected of a professional caregiver than people sometimes realize. For certifications, I’d suggest prioritizing CPR, First Aid, and safe transfer/mobility training, since those are practical and useful every day. Dementia care courses are also a huge plus, and they can open doors to more specialized roles that families are always looking for.