1. Use a step-thru bike in good condition with inflated tires, working brakes, and a seat you can lower so that your feet are flat on the ground. (See here for tips on where to get a bike.)
2. Choose a place where there are no motor vehicles, a flat stretch of pavement, and a slight hill (preferably grassy, but paved works, too).
3. Wear a helmet. See this quick Tiktok for how to fit it properly:
Think “two fingers” when you fit your bike helmet properly!