I know exactly what you mean.

One of the things that might resonate is the fact that an ADHD brain is motivated by different factors, in particular:

• Interest
• Competition
• Novelty
• Urgency

So if you can stoke one (or ideally more) of these things then you should be able to get motivation to read or to complete other tasks that you have been struggling to initiate.

Interest is a tricky one but if you can spark your interest by parlaying your current interests into where you want to focus, it becomes easier (this is a tricky skill to describe but as an example, I love cooking and I hate chemistry. The only ways that I've been able to engage with chemistry have been by making what you might call Improvised Ex... citement Devices back when I was a teen [not the kinky kind!] or by using my interest in cooking to learn about food science to learn about chemistry.)

Competition is easier. Race the clock, put artificial deadlines on yourself, make a commitment to talk to a person about a chapter of a book, participate in an online course where the deadlines are set for you, that sort of thing. When you're racing against something, you'll be better able to focus in and remain focused. This overlaps with urgency in many respects.

Novelty can be a bit tricky but some people benefit from reading more than one book at a time and switching between them when one gets boring. I can't do that because my brain goes on deep-dives and pulling myself out of one rabbithole and into another is too difficult. But as Foucault has suggested, different settings can definitely help with a sense of novelty.

Know that your motivation will ebb and flow and try to ride the wave rather than swimming against the tide because the latter will sap your executive function and forcing things will onlymake it harder.

I often use discussions (and arguments) online to motivate me into reading more. Often I've read the important parts of a book but getting in depth on a topic makes me excited about it and it can motivate me to read more of the book that I'm referencing because I feel this renewed sense of purpose in reading up because it feels more relevant somehow. If you can find a person close to you (or someone on social media) who is open to it, try reporting back to them about what you've learned or what's happening in the story. This can help keep the motivation up by making it more external.

Moderate or heavy exercise, even fairly short amounts of it, can have a significant positive effect on ADHD brains for focus. That might mean running or cycling or even just doing 5 mins of jump rope but if you really want to get focused without medication then that sort of exercise can go a long way.

Other options are: some people report good effects from taking L-tyrosine or L-dopa supplements, some people have been known to import Modafinil on the gray market to use that because it's one of the second-line meds used to treat ADHD. YMMV on these but it's worth considering.