masturbating 101

so I just read that its normal for your clit to disappear when aroused. is that true? I know where mine is but I couldn't see it when I got horny so I'm assuming its true but it just looks so weird? is that normal? also how do ppl rub it while they masturbate? like do you just rub that general area? sorry this is probably stupid but I'm just starting out and know nothing lol