You Could Have Considerable Trouble Finding One To Rent To Practice Shifting Skills.
Beginners can damage clutches and transmissions. Rental car companies would probably have trouble keeping clutches in their vehicles and probably avoid them. I wouldn’t let anybody “practice” on one of my cars, the only one with a manual transmission.
Perhaps you could go “car shopping,” new or used. A salesperson would probably over-look rooky status to possibly make a sale (and it’s not their car).
CSA