If you have never rented a motorbike anywhere, Hanoi is an intense place to start. The process is simple; the traffic is the exam. Here is the walkthrough in the order it happens to you.
Before you go: the licence check
Do not skip this. To ride legally you need a licence Vietnam recognises - most visitors use their home motorcycle licence plus a 1968-convention IDP. If you have neither, your legal options are a 50 cc bike or a licence-free e-bike. The licence articles cover the routes; decide before you shop, not at the counter.
Choosing your first rental bike
Automatic scooter, full stop. No gears to manage while you learn how this city moves. The common automatic rentals (Honda Vision, Honda Click, Yamaha Mio) are light, low-geared for city speeds, and forgiving. Semiautomatic underbones like the Honda Wave are the local workhorse and are cheap, but the foot-shift adds one thing to think about on day one. Save manuals for later.
At the shop
Passport, deposit (typically 2,000,000-5,000,000 VND), rental price - cash, transfer or QR. Run the inspection checklist even though everything is new to you: lights, horn, brakes, mirrors, tyres, fuel. Photograph existing scratches. Ask the one beginner question that matters: how does the side stand / centre stand / steering lock work on this bike.
The first ten minutes
Ride the block around the shop before committing to the road. Practise in this order: throttle control (automatics creep from idle - keep a brake covered), both brakes (rear first, front second), and mirrors. Then enter traffic with three habits: slow, predictable lines; horn before you drift past anything; and never assume a bus has seen you.
Rules that keep first-timers legal
Keep right, no sidewalk riding (fined), no phone in hand (fined), helmet on. Traffic moves by negotiation - read the lane-rules article before your first big junction.
What nobody tells beginners
Everyone in Hanoi traffic is predicting everyone else; being predictable is a safety feature. Slow is legal, slow is fine. And the shop is a resource - if the bike feels wrong on day one, take it back; that is what the maintenance side of the rental is for.
First rental nerves are normal and they wear off within a day. Rent the automatic, do the checklist, ride the block, then the city.