Are there experts to help with teaching a caregiver how to transfer a LO?

Generally for safety for both it is recommended 2 people lift/ transfer.
I would not attempt to lift my husband, even with safest techniques.

I am with u. I am 5ft with a 5ft 10in husband who weighs 200#. Short people have no leverage like taller people.

Besides consulting a physical therapist, you might also want to look up “Hoyer lift” on YouTube. It’s a very nifty piece of durable medical equipment that my sister and I used for transferring my paralyzed father to and from wheelchair and bed. It’s great. A doctor can order it for you.

Physical therapists are the experts on this. And CNA’s often have years of experience and have learned many “tricks of the trade” in order to avoid injury to themselves or their patients.

Why not ask these caregivers to teach you how to do the transfers? Or call a physical therapist to train you to do transfers, including in and out of the car.