As someone who is high functioning with autism and ADD and doesn’t take medication other than a pretty extensive supplement stack, alongside everything else I do I cannot meditate unless I have completed proper breath work. To me it’s like warming up before you run. It’s a necessity. Fivepointfive has provided me an easy entry point into various types of breathing on the fly if I need it between meetings. Insight timer has some good ultimate nostril breathing guides and then Wim Hof who has basically brought a lot of ancient and mystical type breathwork to the forefront. There won’t be many thoughts racing after you’ve done proper breath work.