How do you stay focused when reading?

I'm not really a book reader myself but I have read some books when I was young, I've always read manga, web comics, listened to narrative podcast, etc. cus I still want to engage in stories outside of movies/series. Recently wanted to get into it mainly cus I want to lessen my screen time and want to exercise my brain more ig?

Just to preface, I'm not diagnosed with anything so I'm not sure where this quirk is coming from but years later I'm still having a hard time focusing on the words I'm seeing. I understand them and "see" the events in my head but sometimes I drift and have to reread paragraphs til it stick. This honestly frustrates me cus I know I'm engaged with the story its just hard to get through more than a 5 page chapter the whole day. I think is my eyeisight (-8, -12) always plays a role, my vision makes me have to put the book literally inches from my face. But now, I've gotten a bit better bc I set time to read them out loud to myself. This is also why I search for books with audio narration.

I want to know what you guys do too like id there any environment changes you made to address this issue? Also curious if you guys read multiple books at ones cus I'm trying to get through the shining (slowly) and committed to finishing it first before the others but since getting project hail mary, I kinda wanna switch up for a bit.