Exercises on lichess are one of my favorite ways to kill time. Haven’t played a real game in years but I love the low pressure of running through little scenarios, even if I can’t always grasp why the computer thinks a particular line is optimal lol
(And you can do a bunch of them offline)
Yeah this seems common. I had a friend who grew up with parents who alternated between English, Portuguese, Italian, and French, and he told me he wound up not being able to speak at all until he was over 2 years old. It didn’t affect him badly later on, and he always insisted it was worth it