First, a little housekeeping. How to meditate with ADHD myths about meditation and the myths about meditation that scare people off are knotted together, and nobody tells you that from day one. Most people quit within seven days because somebody swore the goal is an empty head. Wrong. A brain like yours was never going to go silent on command, and that's absolutely all right.

The quiet-brain fairy tale
This is the biggest whopper. You sit, close your eyes, and thoughts evaporate like fog at noon. Never happens. Thoughts keep showing up, even for people who've practiced for forty years. The actual skill is catching yourself mid-wander and stepping back. Every return counts as one rep, like a bicep curl for attention. Wandered off forty times? Nice, that's forty reps in the bank. Gold star.
Begin absurdly small
Toss out the twenty-minute rule. Go for a minute and a half. Set a timer, because clock-watching is a trap for a restless mind. Pick a single anchor, such as the weight of your feet on the floor or cool air slipping past your nostrils. When your brain sprints off to tomorrow's to-do list, mutter "ah, there you go" and come back. No scolding. Scolding only piles a second problem on top of the first, and you've got plenty on your plate already. Stretch it by half a minute next week if you feel like it. Plenty of people stay at two minutes for months and still feel the difference.
Your body gets a vote
Another myth says you have to sit like a statue. That rule chases plenty of fidgety people right out the door. Walk slowly instead. Feel heel, arch, toes, repeat. Or hold a smooth pebble and trace its edges with your thumb. Rocking a bit in your seat is fine. So is a fidget ring. A woman I once met did her finest sessions folding towels. Nobody gave her a medal, but she stopped skipping days. A calm mind doesn't depend on a frozen body, and for a lot of us, movement is the very thing that gets us through the door.
Quiet can feel like a nursery with nobody watching
A guided recording hands your brain a voice to follow, which cuts down the odds of vanishing into a daydream for ten minutes. Grab one with short prompts and tiny gaps between them. Once that feels easy, stretch the pauses a little. It's basically training wheels. Nobody mocks a kid for using them.
It's supposed to feel peaceful, right?
Nope, wrong again. Some sessions feel itchy, dull, or weirdly emotional. That's information, not failure. Some days you'll stand up calm. Other days you'll stand up grumpy and quietly proud that you showed up at all. Both count. Tie the habit to something you already do, like pouring coffee, so you don't need willpower you won't have at 7 a.m. Dropped off for three days? Welcome to the club. Sit for ninety seconds today and call it even.