Please don't get discouraged, this is doable. When we got the diagnosis I really wondered if we could do this: injections, home testing, changing the diet. We did incredible imitations of Laurel & Hardy routines, possibly even the Three Stooges. It is laughable now, not so much then. However, we persevered. I learned to do the injections and since Idjit's head was in his food bowl, he never noticed. I found a way to feed him/inject at a level that was comfortable for me.
We do double team when we test, DH holds and comforts Idjit, I do the testing and it goes very well. Idjit is a big cat, and does not suffer fools easily.

We are older, not so limber (actually creaky) so together we figured out how to do what we needed to do. DH sits on kitchen stool next to the counter holding fidgety Idjit, where there is good light. The height is ideal for me so I can reach his ears and get the test done quickly. He knows what to expect now, because as soon as we finish and he gets down, he goes to his feeding area waiting for his treat.
He has chronic ear irritation also and has to have ears cleaned regularly. We just use the same procedure and he gets his treat. Idjit went into remission quickly so we don't have to test as often, but he knows the kitchen stool and Dad picking him up means "ear work", and knows what to expect: that yummy treat at the end.
Most things worth doing take practice and patience.
Be kind to yourself and know that every day you are going to learn more and take good care of Boots.
Read the information, ask questions, realize that there is support here for you.
