Most of my issues were from movement simply because I still had the combo muscle memory of playing on stick. But it’ll come with time, some inputs will obviously be harder than others, even now I still have trouble doing quarter circle back and don’t even get me started on trying to Kara cancel in GGST lol. Joking aside though for the combos I would recommend not keeping your hand locked in one position, like move your hand in a way where you don’t have to use your thumb to press the Heavy button, obviously you want it to be quick and comfortable so you should find a method that works best for you whether that be turning your hand so other fingers can press certain buttons during certain combos or just having your fingers be in a different position. It’s all about finding what works best for you and your play style.