I’ve been using a Paycheck Baits punch skirt with a 1/2-3/4 oz tungsten weight depending on how thick the vegetation is. Anywhere there is thick junk, even if there are small holes, I consider it to be “punching.” Catching a few fish with this technique, as with most others, will boost your confidence and you will feel more efficient with it.
A big key to being successful with punching is having the ability to notice those subtle differences in the vegetation you’re punching. Some are relatively obvious, but once you find those key little changes it can make a world of difference.