Walker is not a true point guard? She's certainly not a shooting guard--not big enough for that role and doesn't shoot well enough for that role. That only leaves what she's been playing--PG.
You can't make players better than they naturally are. What you can do is emphasize the fundamentals and playing smart on the court. Harper should be in Jackson's kitchen, for example, for her sometimes half-hearted defense. She is arguably the best athlete on the team and yet she gets beat off the dribble like everyone else, because she doesn't get low enough when playing defense---the commitment is not fully there.
And with everyone, the fundamentals means making smart decisions: Take the open 7 foot jumper and don't try to dribble into traffic to get closer to the basket and lose the ball---as our players do a lot. Don't try to shoot the ball if you are well guarded, which we do a lot. Pass the ball. Know when to get the ball to a post player with good position--and the proper way to get her the ball (typically with a bounce pass)--don't try to lob it in there and watch it get deflected/stolen. If you're guarding someone who does not have the ball, know where the ball is so that you can help quickly if need be. This is another area of poor fundamentals by our team--bad help defense. I can't forget the recent game where Franklin was guarding someone in the paint and completely oblivious to the fact that the guard with the ball beat her Vol defender (how many times does that happen ever game--30?) and is going in for a layup. Franklin, who was no more than a few feet away, had no idea where the ball was. I don't mean to pick on her--as others make the same mistake and are slow to react and help, Etc. etc. etc. etc. We would be a minimum of 10-15 percent better if we played smarter basketball--which the good teams do. We've not been a smart BB team for a LONG time.
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