On a serious note, sincerely, can someone explain to me how I can screw up
a mask clearing drill, a regulator recovery drill, an air sharing drill or for that
matter any of the other basic skills?
It's true that many of the skills are pretty straightforward, with a caveat here and there. The caveats are the little mistakes that we routinely see students make and that we watch for as they are beginning to perform the skills. You asked for an example, though, so here's one. As mentioned by several others, breath-holding poses a big potential risk, even in a pool, and we have to be very vigilant when teaching, for example, regulator recovery, to remind student divers to blow bubbles whenever the reg is out of their mouth. We start with that skill in the very first pool dive, and we try to instill this no-reg-bubble-blowing habit starting with regulator clearing, moving to reg recovery and clearing, to stationary alternate air source use, ooa drills, and so on. Each progressively more complex skill that involves taking a reg out of the mouth task loads the student to some degree, and often (I dare say in the majority of cases), even when they KNOW they have to blow bubbles, they forget and hold their breath while performing the skill. It may very well be that you are insisting on bubble-blowing, but if you're not, and she gets in the habit of recovering a reg without blowing bubbles because you've covered the skill over and over and over with her in the pool, she cold easily acquire an ingrained bad habit that has to be changed.
I know I have less than 100 dives, but how many bad scuba behaviors can I actually teach her in the pool?
...Seriously, can someone give me an example of some bad behavior or bad advise I may
be "likely" giving my daughter?
I don't believe I or anyone else said you were "likely" instilling bad habits. I only suggested that you may be doing so unwittingly, but that I can't say since I've never seen you dive. The big three elements of good technique in scuba diving, IMO are buoyancy, trim, and propulsion. You could be, for example, a hand swimmer so that your daughter sees that and picks up this bad habit; you could dive in a 30° head up angle so that she sees that and copies it; you could be using an inefficient kicking style which she emulates. All of these, once they're ingrained, take a lot of work to fix. I admit that as an instructor I'm fairly fanatical about insisting on good trim, efficient kicking, and no hand swimming, and I realize that not all instructors take this position, but these would be the sorts of behaviors I'd be watchful for if I received a student like your daughter with hours of instruction from a relative who could be still fine-tuning his own skills.