CM for a non verbal learner who isnt reading yet

So my ds is 8 and we started cm when he was 6. He is beginning to read independently but reading is a struggle for him. So I still read aloud all our information. His 6 year old brother is just starting officially this year but he has “done school” with us for most of the last 2 years. My oldest has grown in his ability to listen to a story and narrate it a lot! But he still learns best when he can do something and then if not do something then see something. So stories with pictures (even if just a few) or dvds or documentaries help him a ton. He amazes me as to what he remembers after just watching or doing something once! But when I read aloud he has to definitely focus to get it. So my question is how do I teach so many subjects by reading aloud the material when he struggles to listen for longer periods of time? Even when I only read for 15 mins in one subject and then an hour or two later read 15 mins in another and then another later he gets super over it. So the past two years I have mostly saved the read aloud instruction for bible, literature (and we use this a strictly literature not history or science literature books) and poetry. So far that is about the limit and then I start losing him even with breaks that are long and other subjects in between. But I would like to use more living books especially in my history and science as well as a spine for history. But I am just not sure how you work that out with a child like mine. Do you just not use as many books and stick with what he does best or keep pushing it or what? Love to hear everyone’s thoughts and experiences! Thanks and sorry so long!