m-w-f sounds a little much especially if just starting out
It's a lot, but eg the KTM protocol is very frequent, and has produced great results.
IMO, you should cycle it. Do a couple of weeks of more frequent grip training, and then back off it, do perhaps once or twice a week for a few weeks.
And static singles is IMO the way to go with grippers. A few negatives don't hurt either.
But pinch gripping and support grip training should not be forgotten either.