If you cannot see the After Effects app and the creative cloud app then your computer is not compatible with CS. It's as simple as that.
There have been numerous posts on this same subject.
Well, i can see the app and i even updated after effects but idk why i cant
Okay if you install the app successfully then I misunderstood. You open aftereffects like you do any other app from your applications or programs folder. Just look for it. It's there.
If you are trying to open the app from your applications or programs folder and it is failing to initialize or crashing, that's a whole different issue. You must provide system details for us to have any chance of solving the problem.