I think hopping into creative game mode is still a good way to practice your gaming skills . Good practice to learn retakes and other skills without being too much under pressure. Arena too, learn how people fight, when to fight and how to fight. And other strategies that will help you in the long run. And going under pressure more often, makes you more relaxed and have better thought process when you're in under even more pressure in certain situations
Personally I'm more relaxed and calm when in endgames and when rotating and tarping in such a small area . Practice makes perfect
Learning how to igl is so fun especially when the rotate was actually so good.