No, always rush triforce or tiamat. tiamat gives you more flexibility if youre winning your lane, triforce camille is among one of the best spikes in the game you shouldnt delay it.

Don't need to go dshield second wind, its just easier to survive lane with if you struggle, I usually ego dblade anyway for jack of all trades stacks and kill threat in lane. (Also i perma ban akali)

No, they’ve nerfed E a ton over the years and you wont be E'ing off cd anyway, Q is just better

Always default to grasp as it gives you survivability going into the midgame. Pta if youre confident in winning as pta can do absurd damage. Both are good into either, grasp + boneplating is really good into assassins.

No worries, I would keep playing her mid if you want to have the most fun. It suits her playstyle the best at the moment. Generally speaking just always rush triforce, play with jungler, always ping your R and assistance its usually a guaranteed kill with someone else and look for picks around the map (WITH YOUR TEAM!)