As someone who (might) have something close to discalculia/dyslexia, i can relate! ,Especially with references, and most, if not all of the tutorials ive looked up have never helped me because i cant predict where a certain body part will be, or look like. I cant use stuff like feet or meters (or whatever the hell artists use nowadays/before) when drawing because i missed alot of that due to me just not understanding math at all and not being properly taught, but i dont really see it as a requirement. Same with those super complex head/body mesurement "hacks" that you see on tiktok/youtube where people use mathematical formulas to make a single head. It might work for some, but its absolutely horrible for people who dont understand measurements.
But honestly the best advice i can give is just to use references, BUT, dont copy them 1-1. Instead of just ramming head first into the thing your referencing, study the body parts that make up the reference. Break it down into simpler parts so you can put it on paper with your own style. (if that makes sense? hopefully im not being too brief). You can use the line of action method, but what i usually do (which might not be the best method with certain poses, but you can try it yourself anyways if it works for you!), draw out blobs of colour seperating each body part (like a silhouette) on the reference image, moving that sillouette next to the reference, and then trace over that silouette and eyeing the reference instead (like this for example). It helps me alot, especially with more complex poses that are harder to draw (like if the arm is hidden in the back, or if the outfit the person is wearing is black, or merging with other parts).