5 yo with ADHD

I am working with a 5 yo boy with ADHD, he is highly intelligent but very demanding all day he wants me to play with him doing what he wants and he doesnt like to listen to my suggestions, I am trying to have time when he plays alone esp outside but its comstantly Miss Sara, Miss Sara.
Also trying to do lessons with him is hard as he always does things his way and just wants to rush through and is not open to what I say
I also have his 1 year old sister and am usually physically exhausted st end of the day.