I think Marxist theory can be accessible to everybody. I say this as someone who has serious issues with reading caused by ADHD and probably Dyslexia. I don't know if I've mentioned this recently but I have to go over every post I type or response I make with TTS like three times to make sure my sentences are in the right shape. Like I'm right there with you, comrade, but I think that people in far more difficult situations than ours have found the ability and tools to educate themselves on marxist theory in the most difficult of conditions. Mao gave lectures and wrote theory out of a cave. Y'know? Peasants and workers in the most abject conditions throughout history have managed to understand Marxist Theory. I say this as an encouragement.
And certainly, there are more accessible communist texts out there. The thing about understanding theory is that ideas build on each other. You have to understand some very basic concepts before you can understand more advanced ones, and it's going to be difficult even doing that not because you're stupid, but because you've been taught ideological propaganda meant to oppose Marxist theory your whole life.
it requires going into it with the understanding that you will be told things that may confuse or upset or offend you. It requires going in with an open mind, enough that you can allow yourself to listen to those things regardless and still consider and chew on them. and, unfortunately, it requires learning to trust yourself enough to be able to discern which sources to trust, and what knowledge can be gleaned from all sources, marxist or otherwise.
that said, some more beginner-friendly texts I hope that I can recommend:
The Communist Manifesto (I know it's a stereotype but it's obviously important and a valuable place to start) [audiobook] [text] [1h13m]
You could conceivably listen to the first three of these texts in one sitting, over the course of an afternoon or an evening. It would take about the length of a long feature-length film, and I think they're all relatively accessibly worded. Foundations of Leninism is a bit longer, it'd be a long afternoon by itself, closer to a day-long tv show binge, but you don't have to listen to it in one sitting. if you listen to a half hour of Foundations of Leninism a day, you could finish it in a little over a week. And I think it's ok to be patient with yourself. You're not on a schedule. You don't have a deadline about this. And I think you should give yourself permission to chase your curiosity! If there's a topic that you find particularly interesting, go investigate! Reading theory doesn't have to feel like homework.
When I first started learning about theory a number of years ago, I felt excited and hungry, because I felt I was finally being given answers to questions I'd had all my life, and in shockingly plain language, no less! I hope you can find it exciting and engaging, more than a feeling of responsibility or obligation. Theory can be fun, even, dare I say. And every theorist has their own tone and voice. Lenin is frequently funny and snarky. Mao is very blunt and speaks in a kind of technical language I find particularly engaging. Stalin writes in a way that feels very giving-it-to-you-straight.
Good luck! I wish you the best! Wanting to learn more is the first step and it's the most important and most difficult one, that many people never even get past! Your expressed desire to learn already puts you ahead of the game for many, many people in the world, who will, woefully, only think of Marxism as an antiquated philosophy of "a dead old white guy" at best or some kind of Satanic force at worst. Your curiosity is your greatest asset, and you should be proud of it and nurture it!