I find your post odd....in a nice odd sort of way.
Your 5 handicap and dont practice!...
Do you play 3 or more times a week because you must be a natural!.

I'd practice every hour I can if I was let..but not at a driving range.
I practiced an hour a day for last 10 days and loved every min of it at my local Clubs practice ground.

Go try out an hour a day off real grass at a practice area and try out some fun shots around greens.
At 5 handicap I reckon the best way to lower your scores and handicap is your short game.

So have fun with your short game and find a tricky practice putting green and try and be inventive
Brian