advice.... practice without a mirror until you grab it seamlessly. take baby steps. This is not a crucial sleight of muscle memory until you try and do it quickly. So for now, just do it, sit in class with your cards under the desk one handed top palm, these days, your not hiding the fact that palming a card is... a hidden magic move. if it were a double lift, ya, thats a time to be alone. but palming, no man just get it done, then later, work on angles. all the basics too. card college and royal road has palming, daniel madison uses palming in a lot of effects, not really taught, but you see a lot of pictures. crash course 2 from E crudely describes it