You can install a third-party launcher with a feature to hide apps from normal use. You can for example get launchers that will allow you to set a gesture pattern on the home screen which will then reveal your secondary/hidden set of apps. Personally I don't use the feature, but I know Nova Launcher has it. You might need to purchase the Prime version to unlock this feature. I have had it for many years, and don't use the feature as said, so don't know if it is part of the free version or not.