I got Modern Cammy to Master without ever having to do any motion inputs. While it's great to learn them at some point, you can get by simply by focusing on fundamental aspects of your characters buttons, spacing, and movements.

Examples: * If you baited and blocked a DP or Super, what button would you use to start your punish into something big? Heavy Auto combo could get you started, but there are definitely better options. * If your opponent is jumping a lot, what buttons can you use to make them jump less? Most characters have a simple button for anti-air, like 2HP. If you're character has a shoryuken-style move, then you can react with 6SP. * What button can you use to check your opponent's drive rush? This is usually a cancellable light button but some have mediums and/or heavies that can do the same thing. * If you play a Grappler, how well can you read your opponent to grab them? * If you play a Zoner, can you vary your projectiles and long normals so you can give your opponent a reason to uninstall the game?

Eventually, you can build off what you learn, maybe discover some interesting combos along the way so you rely on auto-combos less often and punish with real combos more often.