I want to see how can I make this 3-gear bike go easier on uphill. It has an internal gear hub. I don't know much about bikes but I'm thinking if I can merely replace the hub for one with 14 gears (Rohloff Speedhub) and also, not sure, but can I change the single chainring at the cranks (front) with another one that will have two chainrings so that I get a smaller one to make uphill even easier.
PICTURE: REAR gear
PICTURE: front gear