Yes, Moto Z2 Play 64GB does support OTG.
Moto Z2 Play comes with Water repellent nano-coating**. Advanced nano-coating technology creates a water repellent barrier to help protect against moderate exposure to water such as accidental spills, splashes or light rain. Not designed to be submersed in water, or exposed to pressurized water, or other liquids.
Moto Z2 Play is quite light weight. It wighs just around 145 grams.
Yes, Moto Z2 Play does support VR glasses.
Yes, you can use both the Sim cards as well SD card at the same time.