I havent read much about stoicism. But if I had to guess, being serene all the time is not being stoic. You should experience all the emotions, yet simultaneous

I havent read much about stoicism. But if I had to guess, being serene all the time is not being stoic. You should experience all the emotions, yet simultaneously realize you can be angry and still have peace. Because you can accept the feelings as natural. The question then becomes will you act on the anger or not act. Either way you then have peace with your decision.